TSQL in SQL Server 2012


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In this presentation we include the main TSQL changes in SQL Server 2012.


Eduardo Castro Martinez

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  • The FileTable feature in SQL Server Code-Named “Denali” allows SQL Server-based enterprise applications to store unstructured file system data, such as files and directories, on a special FileTable in a relational database. This allows an application to integrate its storage and data management systems, and provides integrated SQL Server services (such as full-text search) over unstructured data and metadata, along with easy policy management and data administration.
  • Traditional indexes store data across rowsColumn index stores data across a columnAllows for faster queries + better compressionCannot easily insert, update or delete data
  • Vertipaq technology that is shared in PowerPivot and Analysis ServicesBetter compression and performance gains due to redundancy across columnsHeavily optimised for star join queries
  • TSQL in SQL Server 2012

    1. 1. Ing. Eduardo Castro, PhDecastro@mswindowscr.org
    2. 2. References Whats 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. 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. 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. 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. 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. 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. 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. 9. Demo
    10. 10. SQL Server Denali THROWcommand 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. 11.  Demo http://www.sqlmag.com/blogs/puzzled-by-t-sql/tabid/1023/entryid/76190/Denali-T- SQL-at-a-Glance-THROW.aspx
    12. 12. T-SQL Enhancements File TableFileTable• A merging of the FILESTREAM and HierarchyID• Can store files and folders• FileTables are accessed via windows share• Created table has predefined schemaCREATE TABLE DocumentStore AS FileTable WITHFileTable_Directory Document FILESTREAM_ON FILESTREAMGroup1;
    13. 13. T-SQL Enhancements Sequence GeneratorSEQUENCE• 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. 14. T-SQL Enhancements Sequence GeneratorCREATE SEQUENCE ComWinSchema.IdSequence AS INT START WITH 10000 INCREMENT BY 1;GOINSERT INTO ComunidadMembers (MemberId, Name)VALUES (NEXT VALUE FOR ComWinSchema.IdSequence, Juan);INSERT INTO ComunidadAdmin (AdminId, Name)VALUES (NEXT VALUE FOR ComWinSchema.IdSequence, ‘Juan);
    15. 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. 16. T-SQL Enhancements Paging-- In DenaliSELECT...ORDER BY ...OFFSET 10 ROWSFETCH NEXT 10 ROWS ONLY Not a performance improvement, there for ease of use Perf is similar to using ROW_NUMBER
    17. 17. Demo
    18. 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. 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. 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. 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. 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. 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