In this presentation we include the main TSQL changes in SQL Server 2012. Regards, Eduardo Castro Martinez

1. Ing. Eduardo Castro, PhD
ecastro@mswindowscr.org

2. References
 What's new in SQL11 by Roger Noble
 DAT303 SQL Server “Denali” High Availability: The next generation high availability
solution
 http://blogs.technet.com/b/dataplatforminsider/archive/2010/11/12/analysis-
services-roadmap-for-sql-server-denali-and-beyond.aspx
 http://prologika.com/CS/blogs/blog/archive/2010/11/15/bism-column-store.aspx
 http://msdn.microsoft.com/en-us/library/ms174518.aspx
 http://www.jenstirrup.com/2010/11/project-crescent-in-denali-bism-summary.html
 http://blogs.msdn.com/b/ssdt/archive/2010/11/08/welcome.aspx
 http://msdn.microsoft.com/en-us/data/gg427686
 http://www.msteched.com/2010/Europe/DAT314
 http://www.msteched.com/2010/NorthAmerica/BIE304
 http://ecn.channel9.msdn.com/o9/te/Europe/2010/pptx/bin303.pptx
 DAT303 SQL Server “Denali” High Availability

3. References
• What’s new BOL - http://msdn.microsoft.com/en-us/library/bb500435(v=SQL.110).aspx
• HADR - http://msdn.microsoft.com/en-us/library/ff877884(SQL.110).aspx &
http://www.brentozar.com/archive/2010/11/sql-server-denali-database-mirroring-rocks/
• Atlanta - https://www.microsoftatlanta.com/
• T-SQL - Tobias Ternström
• Sequence Generators - http://msdn.microsoft.com/en-us/library/ff878058(SQL.110).aspx &
http://www.sergeyv.com/blog/archive/2010/11/09/sql-server-sequence-generators.aspx
• Contained Databases - http://sqlblog.com/blogs/aaron_bertrand/archive/2010/11/16/sql-server-v-next-
denali-contained-databases.aspx
• Data Quality Services - Denise Draper
• Column Store - http://download.microsoft.com/download/8/C/1/8C1CE06B-DE2F-40D1-9C5C-
3EE521C25CE9/Columnstore Indexes for Fast DW QP SQL Server 11.pdf
• UDM & BISM - http://blogs.technet.com/b/dataplatforminsider/archive/2010/11/12/analysis-services-
roadmap-for-sql-server-denali-and-beyond.aspx &
http://prologika.com/CS/blogs/blog/archive/2010/11/13/business-intelligence-semantic-model-the-
good-the-bad-and-the-ugly.aspx
• SSIS - Matt Masson
• SSIS Resolve References - http://www.sqlservercentral.com/blogs/dknight/archive/2010/11/15/ssis-
denali-resolve-references.aspx
• BISM vs SSAS - http://cwebbbi.wordpress.com/2010/11/14/pass-summit-day-2-the-aftermath/
• Crescent - http://www.jenstirrup.com/2010/11/project-crescent-when-is-it-best_1327.html

4. T-SQL Enhancements
 Robust Discovery of Result Set Metadata (replacing
SET FMTONLY)
 Improved Error Handling
 Introduces the THROW, which allows us to re-throw an
exception caught in an exception handling block
 FileTable
 Sequence Generators
 Paging Construct
 Support for UTF-16
 Collations can be used with the data types: nchar,
nvarchar, and sql_variant

5. T-SQL Result Sets
 Suppose that you need to write code against SQL Server
that uses result sets returned from stored procedures
and dynamic batches
 You need a guarantee that the result sets will have very
specific metadata. if the shape of the result is different
than what you expect, you need it to fail.
http://www.sqlmag.com/blogs/puzzled-by-t-sql/tabid/1023/entryid/76198/Denali-T-SQL-
at-a-Glance-EXECUTE-WITH-RESULT-SETS.aspx

6. T-SQL Result Sets
 You can specify the new option with the EXECUTE
statement when executing a stored procedure or a
dynamic batch
EXECUTE <batch_or_proc> WITH <result_sets_option>;

7. T-SQL Result Sets
 RESULT SETS UNDEFINED
 this is the default, meaning that never mind what’s the
shape of the result sets
 RESULT SETS NONE
 you have a guarantee that no result set will be returned. If
a result set is returned, an error is generated and the
batch terminates

8. T-SQL Result Sets
 RESULT SETS <definition>
 Specify the metadata of one or more result sets, and get a
guarantee that the result sets and their number will
match the metadata defined in the RESULT SETS clause

9. Demo

10. SQL Server Denali THROW
command
 The THROW command can be invoked in two main
ways:
 Without any parameters within the CATCH block of a
TRY/CATCH construct. This will essentially re-throw
the original error.
 With parameters to throw a user defined error.

11.  Demo
http://www.sqlmag.com/blogs/puzzled-by-t-sql/tabid/1023/entryid/76190/Denali-T-
SQL-at-a-Glance-THROW.aspx

12. T-SQL Enhancements File Table
FileTable
• A merging of the FILESTREAM and HierarchyID
• Can store files and folders
• FileTables are accessed via windows share
• Created table has predefined schema
CREATE TABLE DocumentStore AS FileTable WITH
FileTable_Directory Document
FILESTREAM_ON FILESTREAMGroup1;

13. T-SQL Enhancements Sequence Generator
SEQUENCE
• Generates a predicatble number of values
• Global
• Can be
ascending, descending, minimum, maximum and
cycle
• Supports getting a range via
sp_sequence_get_range

14. T-SQL Enhancements Sequence Generator
CREATE SEQUENCE ComWinSchema.IdSequence
AS INT
START WITH 10000 INCREMENT BY 1;
GO
INSERT INTO ComunidadMembers (MemberId, Name)
VALUES (NEXT VALUE FOR ComWinSchema.IdSequence, 'Juan');
INSERT INTO ComunidadAdmin (AdminId, Name)
VALUES (NEXT VALUE FOR ComWinSchema.IdSequence, ‘Juan');

15. T-SQL Enhancements Paging
-- Before Denali
WITH a AS (
SELECT
ROW_NUMBER() OVER (ORDER BY Name)
AS RowNum ...
)
SELECT * FROM a
WHERE a BETWEEN 11 AND 20
ORDER BY RN ORDER BY RowNum;
http://www.davidhayden.com/blog/dave/archive/2005/12/30/2652.aspx

16. T-SQL Enhancements Paging
-- In Denali
SELECT...
ORDER BY ...
OFFSET 10 ROWS
FETCH NEXT 10 ROWS ONLY
 Not a performance improvement, there for ease of use
 Perf is similar to using ROW_NUMBER

17. Demo

18. VertiPaq
 VertiPaq Storage Engine
 Lots of cheap RAM => In-memory storage
 Column-oriented data compression > 10:1
 Support for column-oriented DAX queries

19. Column Store Indexes
• PowerPivot in SQL Server
• An index is created across columns instead
of rows
• Can give a massive query performance
increase
• Read only
• Reduced IO
• Compressed
• Not a NoSQL implementation / alternative

20. Denali Columnstore Indexes
 Denali introduces a new type of index called the
columnstore.
 This new type of index is built up on the values across
columns instead of traditional row based indexes.
 As data tends to be less unique across a column it
allows the columnstore to efficiently compress and
store data.

21. Denali Columnstore Indexes
 The columnstore is currently read-only, however it can be
updated via dropping and recreating the index, or switching in a
partition.
 Due to the ability to compress and keep the index in memory
the Columnstore can give massive (10x, 100x, 1000x…) increase in
speed to warehouse queries
 Not all queries can benefit and some can regress. In general
typical star join queries found in a Data Warehouse when only a
portion of the columns are selected will get the biggest benefit.

22. Denali Columnstore Indexes
 
http://download.microsoft.com/download/8/C/1/8
C1CE06B-DE2F-40D1-9C5C-
3EE521C25CE9/Columnstore%20Indexes%20for%20Fa
st%20DW%20QP%20SQL%20Server%2011.pdf

23. Column Store Index
http://download.microsoft.com/download/8/C/1/8C1CE06B-DE2F-40D1-9C5C-3EE521C25CE9/
Columnstore%20Indexes%20for%20Fast%20DW%20QP%20SQL%20Server%2011.pdf