Praveena Fernandes (Neo4j) discusses the benefits of graphs vs. relational databases and demos the RDBMS-to-Neo4j ETL Tool.

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@praveenasekhar
SOFTWARE ENGINEER @ NEO4j

2. MOTIVATION

3. 1. Why neo4j over relational database?
@praveenasekhar

4. @praveenasekhar
You store to
looK up &
use it later

5. Organising data in tables and relationships between the data
through keys and constraints restricts easy lookup
@praveenasekhar

6. Person belongs to departments

7. Interpreting relational schema as graph: Person belongs to
departments

8. Interpreting relational schema as graph: Person belongs to
departments

9. Relational vs graph

10. 2. Neo4j is whiteboard friendly
@praveenasekhar

11. Mastering data modelling

12. Conceptual model

13. Logical model

14. Physical model

15. Building relational models: Expectation
Talk: “data modelers still have jobs adjusting for
the nosql environment” Joe Maguire
Data modeling emerged in the 1970’s in response to
the needs of database
Mastering Data Modeling: A User Driven Approach

16. Building relational models: Expectation
Talk: “data modelers still have jobs adjusting for
the nosql environment” Joe Maguire
Data modeling emerged in the 1970’s in response to
the needs of database
Mastering Data Modeling: A User Driven Approach

17. Building relational models: REALITY
Talk: “data modelers still have jobs adjusting for
the nosql environment” Joe Maguire
Data modeling emerged in the 1970’s in response to
the needs of database
Mastering Data Modeling: A User Driven Approach

18. Neo4j is better at expressing what relational schema tries to emulate
Entities -> nodes/labels
Attributes -> properties
Relationships -> relationships
Identifiers -> constraints

19. Psst. it’s whiteboard friendly ;)
@praveenasekhar

20. Neo4j is whiteboard friendly
Whiteboard Neo4j
Praveena
Neo4j
WORKS_AT
@praveenasekhar

21. 3. How do you model in neo4j
@praveenasekhar

22. Relational vs graph
MySql Neo4j
@praveenasekhar

23. Relational vs graph
MySql Neo4j
@praveenasekhar

24. Relational vs graph
MySql Neo4j
@praveenasekhar

25. 4. Neo4j is schema optional
@praveenasekhar

27. Nodes, Labels, Properties, and Relationships.
@praveenasekhar

28. Neo4j is schema optional

29. I’m excited about NEO4j.
How do I get work with Neo4j?

30. neo4j-etl

31. ● Interpret Schema as graphs
● Import { MySQL, postgres, oracle, Db2, Sql Server,
Cassandra } database
● Any database with a JDBC driver that exposes metadata

34. Configure connection
Configure connection url
● Postgres
● Mysql
Start mapping
Select your database
connection to map to
your neo4j instance
Make edits and save
mapping
Edit the mapping,
relationship name, table
name to your liking
Import your data
Into Neo4j
You can import your data
using one of the many
tools
● neo4j-import
● neo4j-shell
● cypher-shell
● cypher

35. Demo

36. Configure Connection

37. Start Mapping

38. Make edits and save mapping

39. Import your data into Neo4j

40. Imported successfully

42. Schema interpretation rules
A table with a foreign key is treated as a Join and imported as a node
with a relationship

43. Schema interpretation rules
A table that has two foreign keys is imported as a JoinTable and imported
as a relationship

44. Schema interpretation rules
A table that has more than two foreign keys is treated as an intermediate
node and imported as node with multiple relationships

46. mapping file

48. Data Extraction and CSV Writes

50. neo4j-import
$./neo4j-enterprise-3.0.1/bin/neo4j-import --into
/tmp/neo4j-enterprise-3.0.1/data/databases/graph.db
--nodes /tmp/csv-003/javabase.Book_headers.csv,/tmp/csv-003/javabase.Book.csv
--nodes /tmp/csv-003/javabase.Author_headers.csv,/tmp/csv-003/javabase.Author.csv
..
--relationships /tmp/csv-003/javabase.Book_Author.csv

51. Migrated db

52. tools used
● Jdbc
● Schema crawler
● neo4j-import,
cypher-shell, neo4j-shell,
cypher

53. Designed for extension

55. Load csv,
Apoc procedures,
neo4j-import,
and
neo4j-admin

56. Conclusion
People interpret the world in predefinedstructures that make sense to them and experience it that way. But as they begin to
explore it you will notice the anomaliesand special case that makes it beautifulthe way it is.. Which is why we need a
database to reflect the same.

57. Adapt predefined
structures and rules
yet
be forgiving when rules
don’t apply.

58. Try Neo4j!
https://neo4j.com/download/

59. Links
Github:
https://github.com/neo4j-contrib/neo4j-etl-components
https://github.com/neo4j-contrib/neo4j-etl-components/issues
Documentation
http://neo4j-contrib.github.io/neo4j-etl-components/
Blog
https://neo4j.com/blog/rdbms-neo4j-etl-tool/
https://neo4j.com/developer/guide-import-csv/
https://neo4j.com/developer/guide-importing-data-and-etl/
https://neo4j.com/developer/guide-import-csv/

60. /
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@praveenasekhar
SOFTWARE ENGINEER @ NEO
Thank you :)