SQL Server 2014 comes with dozens of improvements in various areas. In this presentation we will discuss and see how the new release can make the life of each and every developer easier and what are the top 5 T-SQL enhancements that we can use in our day-to-day work.

1. Sofia Event Center
14-15 May 2014
Boris Hristov
SQL Server MVP, Speaker, Trainer, Blogger and DBA
Top 5 T-SQL Improvements in SQL Server 2014

2. That’s not a Hekaton Talk!

3. So who am I?
@BorisHristov
S
Q
L

4. 5
That’s a talk for….
things that can make your life better

5. Here’s how this will go…
time
We’re here

6. 1Delayed Durability

7. A
C
I
D
Atomicity
Isolation
Each and every transaction
is…
Consistency
Durability

8. Transaction’s lifecycle
Data pages are located in,
or read into, the buffer cache
and then modified
2
Modification is recorded in transaction log on disk3
Later, checkpoint writes
dirty pages to database
4
Buffer Cache

9. Here’s the reason why it’s slow

10. Transaction’s lifecycle
Data pages are located in,
or read into, the buffer cache
and then modified
2
Modification is recorded in transaction log on disk3
Later, checkpoint writes
dirty pages to database
4
Buffer Cache

11. Yes, you can lose data!

12. DEMO
Delayed Durability

13. 2SELECT INTO

14. Why don’t we speed up a bit?
Prior SQL Server 2014:
Serial Execution Plans
SQL Server 2014:
Parallel Execution
Plans

15. Talk with the DBAs
to design a proper
disk and data
layout!
You want that speed, right?

16. DEMO
SELECT INTO

17. 3Cardinality Estimator

18. Why is the CE so important?

19. …and at the same time
The CE has not
been changed
since
SQL Server 7.0

20. Where to expect changes?
Queries with Multiple Predicates Queries Joining Multiple Tables
New Data Not Presented in the Stats
Almost everywhere…
(this, oh btw, means you have to test a lot!)

21. DEMO
Cardinality Estimator

22. 4Inline Index Definitions
(remember this one for later)

23. Remember this improvement
SQL Server 2012
SQL Server 2014

24. DEMO
Inline Index Definitions

25. 5Partitioning Improvements

26. Numbers
0
…
8000
Par**on
2
2501
…
4000
Par**on
1
0
…
2500
Par**on
3
4001
…
8000
Why is partitioning cool and not
cool?

27. DEMO
Partitioning Improvements

28. +1Temporary Objects Caching

29. In summary
Delayed Durability
Parallel SELECT INTO
Cardinality Estimator
Inline Index Creation
Partitioning Improvements
Who said testing is
important?

30. Resources you can use
Just a click
away!

31. Thanks!
Questions?
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