Understanding SQL Database Core is Important to Know how the data is store and the technology behind it

1. SQLTechnology Update | Jan 2019

2. Storage Engine and Relational Engine
(Query Processor)

3. ModuleTopics
• Four Important Concepts
• TemporaryTables Internals
• Concurrency
• Transactions
• Isolation Levels
• SQL Server LockingArchitecture
• SQL and Storage Area Networks (SAN)
• SQL onVMs
• SQLIO Utility
• PartitionedTables and Indexes

4. Four Important Concepts
• Density
• Predicates
• Selectivity
• Cardinality

5. Density
• Equivalent ways of thinking about density
• Density = 1/[# of distinct values in a column]
• Density = Avg. number of duplicates for a given value /Total row count

6. Predicates • Evaluates toTRUE or FALSE

7. Selectivity

8. Cardinality
• Cardinality Estimator is Redesigned in SQL 2014

9. TemporaryTables Internals
• TemporaryTables
• TableVariables
• Table-Valued Parameters

10. TemporaryTables

11. TemporaryTables (2)

12. TemporaryTables

13. Demonstration
• Table-Valued Parameters

14. Concurrency

15. Transactions

16. Isolation Levels

17. Terminology

18. Lock Granularity

19. Lock Hierarchy

20. Shared and Update Locks

21. Exclusive and Intent Locks

22. Schema and Key – Range Locks

23. Lock Compatibility
v
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24. Isolation Levels and Locking Hints

25. Lock Escalation

26. SQL Server LockingArchitecture

27. Demonstration
• Transactions

28. THANKYOU