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Chapter_26.txt
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Chapter_26.txt
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-----------------------------------------------------------------------
-- Source Code: SQL Server 2008 Transact-SQL Recipes, Joseph Sack
-----------------------------------------------------------------------
-- Do not execute the following code in a single batch. These samples
-- are provided in order to follow along with specific recipes.
-----------------------------------------------------------------------
-- Creating and Querying Database Snapshots
CREATE DATABASE AdventureWorks_Snapshot_Oct_08_2008
ON
( NAME = AdventureWorks2008_Data,
FILENAME =
'C:\Apress\Recipes\AdventureWorks_Snapshot_Oct_08_2008.mdf')
AS SNAPSHOT OF AdventureWorks
GO
USE AdventureWorks
GO
UPDATE HumanResources.Department
SET GroupName = 'Materials'
WHERE Name='Production'
GO
SELECT GroupName
FROM AdventureWorks.HumanResources.Department
WHERE Name='Production'
SELECT GroupName
FROM AdventureWorks_Snapshot_Oct_08_2008.HumanResources.Department
WHERE Name='Production'
-- Removing a Database Snapshot
DROP DATABASE AdventureWorks_Snapshot_Oct_08_2008
-- Recovering Data with a Database Snapshot
IF NOT EXISTS (SELECT name
FROM sys.databases
WHERE name = 'TSQL_AW')
BEGIN
CREATE DATABASE TSQL_AW
END
GO
USE TSQL_AW
GO
SELECT BusinessEntityID, CreditCardID, ModifiedDate
INTO dbo.PersonCreditCard
FROM AdventureWorks.Sales.PersonCreditCard
CREATE DATABASE TSQL_AW_Oct_09_2008
ON
( NAME = TSQL_AW,
FILENAME = 'C:\Apress\Recipes\TSQL_AW_Oct_09_2008.mdf')
AS SNAPSHOT OF TSQL_AW
GO
USE TSQL_AW
GO
DELETE dbo.PersonCreditCard
SELECT COUNT(*)
FROM dbo.PersonCreditCard
USE master
GO
RESTORE DATABASE TSQL_AW
FROM DATABASE_SNAPSHOT = 'TSQL_AW_Oct_09_2008'
USE TSQL_AW
GO
SELECT COUNT(*)
FROM dbo.PersonCreditCard