SQL Server 2008 For Developers

SQL Server 2008 for Developers

http://johnsterrett.com/

John Sterrett, @JohnSterrett

Session Code • Session Title

About Me!

• Working with SQL Server since 2006

• Production DBA for 2 Years

• Responsible for 50 Production instances with 1250 Databases

• .NET Developer for 3 Years

• Built a few Data Marts

• Reside in Wheeling, WV (Pittsburgh, PA)

• Syndicated Blogger on SQLServerPedia

• Writer for MSSQLTIPS.com


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


Management Studio Enhancements

• IntelliSense

• Debugging

• Error List

• Object Explorer Details Viewer

• Template Explorer

• Activity Monitor


Transact-SQL Delighters

• Declare and Initialize Variables

• Compound assignment Operators

• Table Value Constructor Support through the VALUES Clause


DEMO!!!

Demo covering The following topics

• IntelliSense

• Debugging

• Error Lists

• Object Explorer Details

• Template Explorer

• Activity Monitor


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 ……


Filtered Indexes!

• Improved query performance and plan quality if used correctly!

• Reduced index maintenance costs

• Reduced index storage costs


DEMO

Filtered Indexes Demo….


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


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


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


DATETIMEOFFSET

• SWITCHOFFSET (DATETIMEOFFSET, time_zone)

• Allows you to change time zones

• SqlDbType.DateTimeOffset


Demo!!

T-SQL Date and Time

DATETIMEOFFSET with .NET


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?


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


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


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)


Demo!!

Table-Value Parameters with T-SQL

Table-Value Parameters with ASP.NET (C#)


MERGE!!!

TRUNCATE TABLE db1.dbo.fool

INSERT INTO db1.dbo.fool SELECT * FROM db2.dbo.fool


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


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


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


DEMO!!

Demo Merge with T-SQL!


Central Management System (CMS) & Policy Based ManagementHave you ever wanted to run a script against all production databases?

Have you ever wanted to enforce naming conventions in SQL Programming?


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


Policy Based Management

• Facets

• Conditions

• Policies


DEMO!

Demo monitoring and enforcing naming standards with Policy Based Management


Change Data Capture

Have you ever wanted to get row deltas on a table without using triggers on the source table?


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


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


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


SSIS with CDC


DEMO!

Enable and use Change Data Capture


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

http://msdn.microsoft.com/en-us/library/cc646008.aspx

http://sqlserver2008jumpstart.microsofttraining.com/content/info.asp?CcpSubsiteID=69&infoid=27

http://msdn.microsoft.com/en-us/virtuallabs/cc138238.aspx

http://www.isvinnovation.com/Directory/Description.aspx?EventId=530

http://www.isvinnovation.com/Directory/Description.aspx?EventId=530

for attending this session and the 2010 PASS Summit in Seattle

SQL Server 2008 For Developers

Technology

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filtered indexes

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