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TechDay: 10 Features do Oracle que voce nao conhecia - CONNECT BY CLAUSE

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Rafael Ponte
Rafael Ponte

Todo banco de dados possui features na qual desconhecemos, o que acaba nos levando a soluções mais complicadas ou menos eficientes, com o Oracle não é diferente. Por esse motivo, pretendo apresentar de forma bastante didática uma série com 10 features do Oracle 11g que eu desconhecia e que tem facilitado bastante minha vida desde meados de 2016. Como primeira feature, apresento o CONNECT BY CLAUSE, na qual nos permite escrever consultas hierárquicas de forma simples levando todo o processamento para dentro do banco de dados. Além disso, também apresento outras maneiras de tirar proveito desta feature no dia a dia.

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10 features do Oracle que você não conhecia #1 CONNECT BY CLAUSE TechDay 2019 - @rponte
describe tb_funcionarios;
Name Null? Type ---------- -------- ------------- ID NOT NULL NUMBER(38) NOME NOT NULL VARCHAR2(200) CARGO NOT NULL VARCHAR2(100) GERENTE_ID NUMBER(38) describe tb_funcionarios;
Name Null? Type ---------- -------- ------------- ID NOT NULL NUMBER(38) NOME NOT NULL VARCHAR2(200) CARGO NOT NULL VARCHAR2(100) GERENTE_ID NUMBER(38) describe tb_funcionarios;
Name Null? Type ---------- -------- ------------- ID NOT NULL NUMBER(38) NOME NOT NULL VARCHAR2(200) CARGO NOT NULL VARCHAR2(100) GERENTE_ID NUMBER(38) describe tb_funcionarios; (FOREIGN KEY)
Name Null? Type ---------- -------- ------------- ID NOT NULL NUMBER(38) NOME NOT NULL VARCHAR2(200) CARGO NOT NULL VARCHAR2(100) GERENTE_ID NUMBER(38) describe tb_funcionarios; (FOREIGN KEY)
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto … Hierarquia
Sabe aquele relatório?
select f.nome as funcionario from tb_funcionarios f order by f.nome ;
select f.nome as funcionario from tb_funcionarios f order by f.nome ;
E o gerente?
select f1.nome as funcionario ,f2.nome as gerente from tb_funcionarios f1 ,tb_funcionarios f2 where f1.gerente_id = f2.id order by f.nome ;
select f1.nome as funcionario ,f2.nome as gerente from tb_funcionarios f1 ,tb_funcionarios f2 where f1.gerente_id = f2.id order by f.nome ;
E o gerente do gerente?
select f1.nome as funcionario ,f2.nome as gerente ,f3.nome as gerente_do_gerente from tb_funcionarios f1 ,tb_funcionarios f2 ,tb_funcionarios f3 where f1.gerente_id = f2.id and f2.gerente_id = f3.id order by f.nome ;
select f1.nome as funcionario ,f2.nome as gerente ,f3.nome as gerente_do_gerente from tb_funcionarios f1 ,tb_funcionarios f2 ,tb_funcionarios f3 where f1.gerente_id = f2.id and f2.gerente_id = f3.id order by f.nome ;
E o gerente do gerente do gerente … do gerente?
Qual a profundidade dessa hierarquia?
Ou faz na aplicação, né?
CONNECT BY CLAUSE
CONNECT BY CLAUSE Oracle
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Stevens Thaio
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Stevens Thaio Principe Victor Aldeir
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Stevens Thaio Principe Victor Aldeir
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Stevens Thaio Principe Victor Aldeir
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Stevens Thaio Principe Victor Aldeir
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Stevens Thaio Principe Victor Aldeir
PRIOR(acessando informações do parent-node)
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,????? as gerente_nome from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,????? as gerente_nome from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,prior f.nome as gerente_nome from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,prior f.nome as gerente_nome from tb_funcionarios f connect by f.gerente_id = prior f.id ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,prior f.nome as gerente_nome from tb_funcionarios f connect by f.gerente_id = prior f.id ;
Mas tem algo estranho…
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
Stevens?
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto …
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto …
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto …
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto … Root Node
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto … Root Node
Mas como chego na raiz?
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
Então vamos começar a hierarquia por ele…
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
E se houver muitas raizes?
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id in (3, 45, 104) ;
Mas o ID vem de uma sequence, e agora?
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
select f.* from tb_funcionarios f ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id in (3, 45, 104) ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
Como visualizar melhor essa hierarquia?
Profundidade
Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto …
Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto … 1
Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto … 1 2
Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto … 1 2 3
Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto … 1 2 3 4 5 6
Profundidade
 (level)
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
Stevens Thaio Principe Victor Aldeir
Stevens Thaio Principe Victor Aldeir .Stevens ..Thaio ...Principe ...Victor ...Aldeir
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || id as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.id as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.id as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.id as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.id as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || id as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
Ordenando…
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order by f.nome ; ????
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ; x
Outra forma de apresentar...
 (path)
Outra forma de apresentar...
 (path) Chris Chris->Ricardo Chris->Ricardo->Plauto Chris->Ricardo->Plauto->Stevens Chris->Ricardo->Plauto->Stevens->Thaio Chris->Ricardo->Plauto->Stevens->Thaio->Aldeir Chris->Ricardo->Plauto->Stevens->Thaio->Principe Chris->Ricardo->Plauto->Stevens->Thaio->Victor Chris->Ricardo->Plauto->Stevens->Thaio->… Chris->Ricardo->Plauto->Guto …
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
Loop infinito?
UPDATE tb_funcionarios SET gerente_id = 1 -- Plauto WHERE id = 3 -- Chris ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ; ERROR: ORA-01436: CONNECT BY loop in user data
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_cycle as is_cycle from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_iscycle as is_cycle from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_cycle as is_cycle from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_cycle as is_cycle from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
Tem mais?
UPDATE tb_funcionarios SET gerente_id = null WHERE id = 3 -- Chris ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_iscycle as is_cycle
 ,connect_by_isleaf as is_leaf ,connect_by_root f.id as root_id from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_iscycle as is_cycle
 ,connect_by_isleaf as is_leaf ,connect_by_root f.id as root_id from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_iscycle as is_cycle
 ,connect_by_isleaf as is_leaf ,connect_by_root f.id as root_id from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_iscycle as is_cycle
 ,connect_by_isleaf as is_leaf ,connect_by_root f.id as root_id from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_iscycle as is_cycle
 ,connect_by_isleaf as is_leaf ,connect_by_root f.id as root_id from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
Dá pra fazer mais?
SELECT level FROM DUAL CONNECT BY level <= 100 ;
SELECT level FROM DUAL CONNECT BY level <= 100 ;
SELECT level FROM DUAL CONNECT BY level <= 100 ;
INSERT INTO t(seq) SELECT level FROM DUAL CONNECT BY level <= 100 ;
INSERT INTO tb(seq) SELECT level FROM DUAL CONNECT BY level <= 100 ;
SELECT add_months(input, (level-1) * 12) as start_date ,add_months(input, level * 12) as end_date FROM ( -- Set the input date here SELECT DATE'2012-02-01' as input FROM DUAL ) CONNECT BY add_months(input, (level-1) * 12) < Sysdate ;
SELECT add_months(input, (level-1) * 12) as start_date ,add_months(input, level * 12) as end_date FROM ( -- Set the input date here SELECT DATE'2012-02-01' as input FROM DUAL ) CONNECT BY add_months(input, (level-1) * 12) < Sysdate ;
SELECT add_months(input, (level-1) * 12) as start_date ,add_months(input, level * 12) as end_date FROM ( -- Set the input date here SELECT DATE'2012-02-01' as input FROM DUAL ) CONNECT BY add_months(input, (level-1) * 12) < Sysdate ;
SELECT add_months(input, (level-1) * 12) as start_date ,add_months(input, level * 12) as end_date FROM ( -- Set the input date here SELECT DATE'2012-02-01' as input FROM DUAL ) CONNECT BY add_months(input, (level-1) * 12) < Sysdate ;
SELECT add_months(input, (level-1) * 12) as start_date ,add_months(input, level * 12) as end_date FROM ( -- Set the input date here SELECT DATE'2012-02-01' as input FROM DUAL ) CONNECT BY add_months(input, (level-1) * 12) < Sysdate ; x está incluindo hoje, 2019-01-31
Concluindo
Obrigado! TechDay 2019 - @rponte

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TechDay: 10 Features do Oracle que voce nao conhecia - CONNECT BY CLAUSE

  • 1. 10 features do Oracle que você não conhecia #1 CONNECT BY CLAUSE TechDay 2019 - @rponte
  • 3. Name Null? Type ---------- -------- ------------- ID NOT NULL NUMBER(38) NOME NOT NULL VARCHAR2(200) CARGO NOT NULL VARCHAR2(100) GERENTE_ID NUMBER(38) describe tb_funcionarios;
  • 4. Name Null? Type ---------- -------- ------------- ID NOT NULL NUMBER(38) NOME NOT NULL VARCHAR2(200) CARGO NOT NULL VARCHAR2(100) GERENTE_ID NUMBER(38) describe tb_funcionarios;
  • 5. Name Null? Type ---------- -------- ------------- ID NOT NULL NUMBER(38) NOME NOT NULL VARCHAR2(200) CARGO NOT NULL VARCHAR2(100) GERENTE_ID NUMBER(38) describe tb_funcionarios; (FOREIGN KEY)
  • 6. Name Null? Type ---------- -------- ------------- ID NOT NULL NUMBER(38) NOME NOT NULL VARCHAR2(200) CARGO NOT NULL VARCHAR2(100) GERENTE_ID NUMBER(38) describe tb_funcionarios; (FOREIGN KEY)
  • 19. select f.nome as funcionario from tb_funcionarios f order by f.nome ;
  • 20. select f.nome as funcionario from tb_funcionarios f order by f.nome ;
  • 22. select f1.nome as funcionario ,f2.nome as gerente from tb_funcionarios f1 ,tb_funcionarios f2 where f1.gerente_id = f2.id order by f.nome ;
  • 23. select f1.nome as funcionario ,f2.nome as gerente from tb_funcionarios f1 ,tb_funcionarios f2 where f1.gerente_id = f2.id order by f.nome ;
  • 24. E o gerente do gerente?
  • 25. select f1.nome as funcionario ,f2.nome as gerente ,f3.nome as gerente_do_gerente from tb_funcionarios f1 ,tb_funcionarios f2 ,tb_funcionarios f3 where f1.gerente_id = f2.id and f2.gerente_id = f3.id order by f.nome ;
  • 26. select f1.nome as funcionario ,f2.nome as gerente ,f3.nome as gerente_do_gerente from tb_funcionarios f1 ,tb_funcionarios f2 ,tb_funcionarios f3 where f1.gerente_id = f2.id and f2.gerente_id = f3.id order by f.nome ;
  • 27. E o gerente do gerente do gerente … do gerente?
  • 29. Ou faz na aplicação, né?
  • 30.
  • 33. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 34. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 35. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 36. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 37. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 38. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 39. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 40. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 41. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 42. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Stevens Thaio
  • 43. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 44. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Stevens Thaio Principe Victor Aldeir
  • 45. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Stevens Thaio Principe Victor Aldeir
  • 46. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Stevens Thaio Principe Victor Aldeir
  • 47. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Stevens Thaio Principe Victor Aldeir
  • 48. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Stevens Thaio Principe Victor Aldeir
  • 49.
  • 51. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,????? as gerente_nome from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 52. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,????? as gerente_nome from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 53. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,prior f.nome as gerente_nome from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 54. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,prior f.nome as gerente_nome from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 55. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,prior f.nome as gerente_nome from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 57. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ;
  • 59. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto …
  • 60. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto …
  • 61. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto …
  • 62. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto … Root Node
  • 63. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id ; Chris Rafael Plauto Ricardo Stevens Thaio Principe Guto … Victor Aldeir Maia Pimentel Roberto … Root Node
  • 64. Mas como chego na raiz?
  • 69. Então vamos começar a hierarquia por ele…
  • 70. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
  • 71. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
  • 72. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
  • 73. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
  • 74. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
  • 75. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
  • 76. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
  • 77. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
  • 78. E se houver muitas raizes?
  • 79. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id = 3 ;
  • 80. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id in (3, 45, 104) ;
  • 81. Mas o ID vem de uma sequence, e agora?
  • 86. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.id in (3, 45, 104) ;
  • 87. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 88. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 89. Como visualizar melhor essa hierarquia?
  • 97. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 98. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 99. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 100. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 103. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || id as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 104. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.id as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 105. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.id as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 106. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.id as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 107. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.id as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 108. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || id as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 109. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 110. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null ;
  • 112. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 113. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order by f.nome ;
  • 114. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order by f.nome ;
  • 115. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order by f.nome ; ????
  • 116. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order by f.nome ;
  • 117. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order by f.nome ;
  • 118. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 119. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 120. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ; x
  • 123. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 124. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 125. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 126. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 127. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 128. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 130. UPDATE tb_funcionarios SET gerente_id = 1 -- Plauto WHERE id = 3 -- Chris ;
  • 131. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 132. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 133. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
  • 134. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ; ERROR: ORA-01436: CONNECT BY loop in user data
  • 135. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
  • 136. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
  • 137. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 138. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_cycle as is_cycle from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
  • 139. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_iscycle as is_cycle from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
  • 140. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_cycle as is_cycle from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
  • 141. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_cycle as is_cycle from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id = 3 order siblings by f.nome ;
  • 143. UPDATE tb_funcionarios SET gerente_id = null WHERE id = 3 -- Chris ;
  • 144. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_iscycle as is_cycle
 ,connect_by_isleaf as is_leaf ,connect_by_root f.id as root_id from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 145. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_iscycle as is_cycle
 ,connect_by_isleaf as is_leaf ,connect_by_root f.id as root_id from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 146. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_iscycle as is_cycle
 ,connect_by_isleaf as is_leaf ,connect_by_root f.id as root_id from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 147. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_iscycle as is_cycle
 ,connect_by_isleaf as is_leaf ,connect_by_root f.id as root_id from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 148. select f.id as id ,f.nome as funcionario ,f.cargo as cargo ,f.gerente_id as gerente_id ,level ,lpad('.', (level-1), '.') || f.nome as tree ,sys_connect_by_path(f.nome, '->') as path ,connect_by_iscycle as is_cycle
 ,connect_by_isleaf as is_leaf ,connect_by_root f.id as root_id from tb_funcionarios f connect by nocycle f.gerente_id = prior f.id start with f.gerente_id is null order siblings by f.nome ;
  • 149. Dá pra fazer mais?
  • 150. SELECT level FROM DUAL CONNECT BY level <= 100 ;
  • 151. SELECT level FROM DUAL CONNECT BY level <= 100 ;
  • 152. SELECT level FROM DUAL CONNECT BY level <= 100 ;
  • 153. INSERT INTO t(seq) SELECT level FROM DUAL CONNECT BY level <= 100 ;
  • 154. INSERT INTO tb(seq) SELECT level FROM DUAL CONNECT BY level <= 100 ;
  • 155. SELECT add_months(input, (level-1) * 12) as start_date ,add_months(input, level * 12) as end_date FROM ( -- Set the input date here SELECT DATE'2012-02-01' as input FROM DUAL ) CONNECT BY add_months(input, (level-1) * 12) < Sysdate ;
  • 156. SELECT add_months(input, (level-1) * 12) as start_date ,add_months(input, level * 12) as end_date FROM ( -- Set the input date here SELECT DATE'2012-02-01' as input FROM DUAL ) CONNECT BY add_months(input, (level-1) * 12) < Sysdate ;
  • 157. SELECT add_months(input, (level-1) * 12) as start_date ,add_months(input, level * 12) as end_date FROM ( -- Set the input date here SELECT DATE'2012-02-01' as input FROM DUAL ) CONNECT BY add_months(input, (level-1) * 12) < Sysdate ;
  • 158. SELECT add_months(input, (level-1) * 12) as start_date ,add_months(input, level * 12) as end_date FROM ( -- Set the input date here SELECT DATE'2012-02-01' as input FROM DUAL ) CONNECT BY add_months(input, (level-1) * 12) < Sysdate ;
  • 159. SELECT add_months(input, (level-1) * 12) as start_date ,add_months(input, level * 12) as end_date FROM ( -- Set the input date here SELECT DATE'2012-02-01' as input FROM DUAL ) CONNECT BY add_months(input, (level-1) * 12) < Sysdate ; x está incluindo hoje, 2019-01-31