This document summarizes a session on SQL Server 2008 for developers. The session will cover Management Studio enhancements, T-SQL features like filtered indexes and table-valued parameters, new date/time data types, the MERGE statement, policy-based management, and change data capture. Demo portions of the session will showcase features like the debugger, filtered indexes, table-valued parameters, and change data capture. The presenter is a SQL Server developer and DBA from Wheeling, WV who writes about SQL Server.

1. SQL Server 2008 for
Developers
http://johnsterrett.com/
John Sterrett, @JohnSterrett

2. About Me!
• Working with SQL Server
since 2006
• Production DBA for 2
Years
• Responsible for 50
• Reside in Wheeling, Production instances with
WV (Pittsburgh, PA) 1250 Databases
• Syndicated Blogger • .NET Developer for 3
on SQLServerPedia Years
• Writer for
• Built a few Data Marts
MSSQLTIPS.com
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3. Topics to Cover…..
• Management Studio (SSMS) Enhancements
• T-SQL Delighters
• Filtered Indexes
• New Date and Time Data Types
• Table-Valued Parameters
• MERGE statement
• Policy Based Management
• Change Data Capture
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4. Management Studio Enhancements
• IntelliSense
• Debugging
• Error List
• Object Explorer Details Viewer
• Template Explorer
• Activity Monitor
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5. Transact-SQL Delighters
• Declare and Initialize Variables
• Compound assignment Operators
• Table Value Constructor Support through the
VALUES Clause
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6. DEMO!!!
Demo covering The following topics
• IntelliSense
• Debugging
• Error Lists
• Object Explorer Details
• Template Explorer
• Activity Monitor
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7. Filtered Indexes!
Have you ever wanted to create an index that filters
between a static search criteria?
CREATE INDEX idxName ON Schema.Table
(Column) WHERE ……
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8. Filtered Indexes!
• Improved query performance and plan quality if
used correctly!
• Reduced index maintenance costs
• Reduced index storage costs
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9. DEMO
Filtered Indexes Demo….
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10. New Date & Time Types
• SQL Server 2008 extends date/time support
• Larger Value Space
– Current DATETIME - 1753-9999 Years
– Current DATETIME - 0.00333 Second Accuracy
– New Date Types - 0001-9999 Years
– New Date/Time Types - Precisions to 100
nanoseconds
• Variable Precision Saves Space
• Separate Date and Time Saves Space
• ANSI Compatible
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11. Date and Time
DATE Data Type
• Date Only
• 01-01-0001 to 31-12-9999 Gregorian Calendar
TIME Data Type
• Time Only
• Variable Precision - 0 to 7 decimal places for seconds
• To 100 nanoseconds
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12. DATETIME2 & DATETIMEOFFSET
DATETIME2 Data Type
• 01-01-0001 to 31-12-9999 Gregorian Calendar
• Variable Precision - to 100 nanoseconds
DATETIMEOFFSET
• 01-01-0001 to 31-12-9999 Gregorian Calendar
• Variable Precision - to 100 nanoseconds
• Time Zone Offset (From UTCTime) Preserved
• Not Time Zone Aware - No Daylight Saving Time Support
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13. DATETIMEOFFSET
• SWITCHOFFSET (DATETIMEOFFSET,
time_zone)
• Allows you to change time zones
• SqlDbType.DateTimeOffset
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14. Demo!!
T-SQL Date and Time
DATETIMEOFFSET with .NET
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15. Table-Value Parameters
Have you wished that you could send a table into a
stored procedure?
Do you wish you could send all parent-child
relationship data in one round-trip?
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16. Table Types
SQL Server has table variables
• DECLARE @t TABLE (id int);
SQL Server 2008 adds strongly typed table
variables
• CREATE TYPE mytab AS TABLE (id int);
DECLARE @t mytab;
Table-Value Parameters must use strongly typed
table variables
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17. Things to know about TVP
ADO.NET 3.5 Supports Table Value Parameters
You can populate TVP from the following .NET
objects
• DataTable
• DbDataReader
• System.Collections.Generic.IList <SQLDataRecord>
Recommended for 1000 or less records
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18. TVP with .NET
SqlParameter tvpParam = new SqlParameter();
tvpParam.ParameterName = "@TVP";
tvpParam.Value = dtList; //DataTable in this example
tvpParam.SqlDbType = SqlDbType.Structured; // This data type allows us
to pass a table into DB Objects
tvpParam.TypeName = "TVPComponentType"; // Name of strong typed
(table type)
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19. Demo!!
Table-Value Parameters with T-SQL
Table-Value Parameters with ASP.NET (C#)
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20. MERGE!!!
TRUNCATE TABLE db1.dbo.fool
INSERT INTO db1.dbo.fool
SELECT * FROM db2.dbo.fool
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21. Merge Statement
Multiple set operations in a single SQL statement
Uses multiple sets as input
• MERGE target USING source ON ...
Operations can be INSERT, UPDATE, DELETE
Operations based on
• WHEN MATCHED
• WHEN [TARGET] NOT MATCHED
• WHEN SOURCE NOT MATCHED
ANSI SQL 2006 compliant - with extensions
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22. More on MERGE
Multiple WHEN clauses possible
• For MATCHED and SOURCE NOT MATCHED
• Only one WHEN clause for TARGET NOT MATCHED
MERGE can be used with any table source
A MERGE statement causes triggers to be fired
once
Rows affected includes total rows affected by all
clauses
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23. MERGE Performance
MERGE statement is transactional
• No explicit transaction required
One Pass Through Tables
• At most a full outer join
• Matching rows = when matched
• Left-outer join rows = when target not matched
• Right-outer join rows = when source not matched
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24. DEMO!!
Demo Merge with T-SQL!
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25. Central Management System (CMS) &
Policy Based Management
Have you ever wanted to run a script against all
production databases?
Have you ever wanted to enforce naming
conventions in SQL Programming?
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26. CMS and PBM
• Central Management System
• Needs only 1 instance of SQL 2008
• Reactive not proactive
• great tool for updating objects on multiple servers
• Policy Based Management
• proactive tool prevents stuff from happening
• great tool to enforce compliance on SQL 2008+ servers
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27. Policy Based Management
• Facets
• Conditions
• Policies
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28. DEMO!
Demo monitoring and enforcing naming standards
with Policy Based Management
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29. Change Data Capture
Have you ever wanted to get row deltas on a table
without using triggers on the source table?
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30. Enable Change Data Capture
• Must have Enterprise Edition
• Uses transaction log to pull deltas
• Enable on database (req sysadmin)
• sys.sp_cdc_enable_db_change_data_capture
• creates cdc schema
• creates cdc user
• creates system tables with cdc schema
• Enable on table(s) (req db_owner)
• sys.sp_cdc_enable_table
• creates sql agent jobs
• creates table cdc.schema_tablename_CT
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31. Change Data Capture data
• Changes stored in cdc.schema_tablename_CT
• _$operation column specifies change type
• 1 = DELETE
• 2 = INSERT
• 3 = BEFORE UPDATE
• 4 = AFTER UPDATE
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32. Querying Change data
• cdc.fn_cdc_get_all_changes<capture_instance>
• gets all changes during specific range
• cdc.fn_cdc_get_net_changes<capture_instance>
• returns final (net change) for each row in the specific
range
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33. SSIS with CDC
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34. DEMO!
Enable and use Change Data Capture
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35. How do you get started?
Using the Transact-SQL Debugger
SQL 2008 JumpStart
MSDN – SQL 2008 Virtual Labs
Developer Fundamentals Part 1: Uncovering T-SQL
on SQL Server 2008
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36. Thank you
for attending this session and the
2010 PASS Summit in Seattle