Download Database_Restore_Testing_Presentation

Database Restore Testing
Automation
Presentation given at the Nov 2016
SLC SQL Saturday Event
by Robert Every
About me
Career
• Graduated BYU
April 1983
• General Electric Ordnance Systems
• General Electric Motors…
1983 – 1985
1985 – 2005
• Genworth Financial
(erstwhile GE Financial Services)
2005 – 2012
• Vangarde LLC (Hill AFB)
2012 – present
About me
Positions Held
• CAD Applications Developer (Calma, CADRA, Pro*Engineer)
• Electronic Document Management System Manager (Oracle)
• Visual Basic Application Developer (Oracle)
• Systems Designer/Analyst (Oracle)
• IT Project Manager (Oracle)
• Data Analyst (Oracle)
• SQL Server Database Administrator (Microsoft SQL Server)
Other Factoids.
• Married 38+ years
• 3 children – UT (2) and MT (1)
• 3 grandchildren
• Interests: Cycling, Eating, Cooking, Baking, Time with Grandchildren, Movies…
Today’s Presentation:
• Importance of Validating Backups
• Database Restore Testing
– Why do it?
– Ways to do it?
– SQL Agent Job(s)
• Code Review
Who coined this saying?
“You don’t have a backup
until you’ve restored it.”
Kimberly Tripp
Kimberly Tripp Biography:
• Taught for Microsoft University (SQL Server, LanManager, Windows) – 1992
• SME & Technical Writer for Microsoft SQL Server Development Team – 1993
• President/Founder and owner of SQLskills.com – Since 1995
• Writer/Editor for SQL Server Magazine
• Lecturer/Presenter at Microsoft Tech*Ed, SQLConnections, SQLPass, and other SQL
Server-related events since 1996
Here’s her full quote:
“You don’t have a backup until
you’ve restored it. You don’t know
whether the backup you just took
was corrupt or not and will actually
work in a disaster recovery
situation.”
Kimberly Tripp
http://www.sqlskills.com/blogs/paul/importance-of-validating-backups/
Source: http://www.sqlskills.com/blogs/paul/importance-of-validating-backups/
Can we guarantee that the backup file
on disk (that we just validated) is good
(i.e., free from corruption)?
Why? Why not?
• Traffic Control Analogy
• An accident can happen at ANY time.
The BEST WAY to know our backups
will restore?
Frequent, actual database restore testing.
Why do Database Restore Testing?
• Continuity of service with current employer
– Any “horror” stories out there?
• Confidence in processes
• Other reasons?
Some Ways to do Database Restore
Testing.
• Manual restore testing
– Same server
– Different server
• Automated restore testing
– Same server
– Different server. Why?
• Lack of space on same server
• Security (Restore test prod DBs on dev server)
• Other ways?
Automated Database Restore
Testing using SQL Agent job(s)
• Benefits of Automation.
– Consistent schedule (same day/time each week)
• Example Schedule: Do Production DBs once/week
and Test/Dev DBs once/month
– Best use of system resources (e.g., on weekends)
– No process variation (minimize error modes)
– Instant notification of success/failure
– Other benefits?
SQL Agent Job (same server)
• Job Name:
Restore Test User Databases
• Job Steps
1. Restore the USER databases from the most
recent FULL and DIFFERENTIAL backups
2. Do DBCC CHECKDB on newly-restored databases
3. Get date/time of last successful DBCC CHECKDB
4. Email DBCC CHECKDB results to DBA
5. Delete the restore-tested databases
1. Restore the USER databases from the most recent
FULL and DIFFERENTIAL backups
/* ====================================================================
-- Name:
Restore the user databases from the most recent FULL &
DIFFERENTIAL (if applicable) backup files on the NAS.
-- Author:
Robert H. Every
-- Create date: 10 July 2014
-- Description: This script gets the name of each user database on the
SQL Server and then it restores the databases with new
names using the most recent FULL backup and, if it
exists, the most recent DIFFERENTIAL backup files.
The name format of the restored database will be
'Restored_' + @ServerName + '_' + @database.
***********************************************************************
** Revision History
***********************************************************************
** Date
Author
Description
============================================================== */
SET NOCOUNT ON
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
@ServerName varchar(128)
@database varchar(255)
@RestoredDatabaseName varchar(255)
@FullBackupPath varchar(max)
@DifferentialBackupPath varchar(max)
@DropDatabaseCommand nvarchar(max)
@RestoreDBFromFullBUCommand nvarchar(max)
@RestoreDBFromDiffBUCommand nvarchar(max)
@linefeed CHAR(2)
@name varchar(max)
@physical_name varchar(max)
@DotPositionFromRight int
@DaysSinceLastFullBackup int
@DaysSinceLastDifferentialBackup int
@RecoverDatabaseCommand nvarchar(max)
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
@year varchar(4)
@Month varchar(2)
@DateInMonth varchar(2)
@LastSaturdayDate datetime
@DaysSinceLastSaturday int
@DatePartOfBackupFileName nvarchar(max)
/* Set the @linefeed variable */
SET @linefeed = CHAR(13) + CHAR(10)
/* Initialize variables. */
SET @ServerName = ''
SET @RestoreDBFromFullBUCommand = ''
SET @RestoreDBFromDiffBUCommand = ''
SET @RecoverDatabaseCommand = ''
/* Get the server name. */
select @ServerName = convert(nvarchar(128), serverproperty('servername'));
/* Get last Saturday's date. */
SET @LastSaturdayDate = (dateadd(DD,-2,DATEADD(WW, DATEDIFF(WW,0,getdate()
0)))
/* Get
select
select
select
the year, month, and day of month data. */
@year = YEAR(@LastSaturdayDate)
@Month = MONTH(@LastSaturdayDate)
@DateInMonth = DAY(@LastSaturdayDate)
),
if LEN(@Month) = 1
SET @Month = '0' + @Month
if LEN(@DateInMonth) = 1
SET @DateInMonth = '0' + @DateInMonth
/* Set the date part of last Saturday's backup file name. */
SET @DatePartOfBackupFileName = @year + '_' + @Month + '_' +
@DateInMonth
DECLARE DatabaseCursor CURSOR FOR
SELECT name FROM master.sys.databases sd
WHERE sd.state = 0
-- state = 0 = ONLINE
and sd.database_id > 4
-- User databases have IDs > 4
and sd.name not like 'Restored_' + '%'
order by name
OPEN DataBaseCursor
FETCH NEXT FROM DatabaseCursor INTO @database
WHILE @@FETCH_STATUS = 0
BEGIN
/* Create the "Restored" database name. */
SET @RestoredDatabaseName = 'Restored_' + @ServerName + '_' +
@database
/* If the "Restored" database already exists, then drop it. */
if exists(select * from master.dbo.sysdatabases where name =
@RestoredDatabaseName)
BEGIN
SET @DropDatabaseCommand = 'DROP DATABASE ' + '[' +
@RestoredDatabaseName + ']'
EXECUTE master.dbo.sp_executesql @DropDatabaseCommand
END
/* Reinitialize variables. */
SET @RestoreDBFromFullBUCommand = ''
SET @RestoreDBFromDiffBUCommand = ''
SET @FullBackupPath = ''
/* Get the path to the last Saturday's FULL backup of the database. */
SELECT top(1)
@DaysSinceLastFullBackup = DATEDIFF(D, MAX(b.backup_finish_date),
CURRENT_TIMESTAMP),
@FullBackupPath = bm.physical_device_name
FROM master..sysdatabases a
LEFT OUTER JOIN msdb..backupset b ON a.name = b.database_name
LEFT OUTER JOIN msdb..backupmediafamily bm on b.media_set_id =
bm.media_set_id
WHERE
a.name = @database and
b.type = 'D' and
-- Type D = FULL Backup
b.backup_finish_date > (CURRENT_TIMESTAMP - 7)
and bm.physical_device_name like '%' + @ServerName + '%backup%' +
@DatePartOfBackupFileName + '%'
GROUP BY a.name, b.type, bm.physical_device_name
/* Build the @RestoreDBFromFullBUCommand command for the FULL backup file. */
SET @RestoreDBFromFullBUCommand = @RestoreDBFromFullBUCommand + 'RESTORE DATABASE ['
+ @RestoredDatabaseName + ']' + @linefeed
SET @RestoreDBFromFullBUCommand = @RestoreDBFromFullBUCommand + ' from DISK = ''' +
@FullBackupPath + '''' + @linefeed
SET @RestoreDBFromFullBUCommand = @RestoreDBFromFullBUCommand + ' with' + @linefeed
/* Get the disk and folder path to the mdf, ldf, and any other database files... */
DECLARE Files_Cursor CURSOR FOR
select name, physical_name -- name = logical name, physical_name = path to file.
from sys.master_files
where database_id = db_id(@database)
OPEN Files_Cursor
FETCH NEXT FROM Files_Cursor INTO @name, @physical_name
While @@FETCH_STATUS = 0
BEGIN
SET @DotPositionFromRight = CHARINDEX('.', REVERSE(@physical_name),1)
SET @RestoreDBFromFullBUCommand = @RestoreDBFromFullBUCommand + ' move ''' +
@name + ''' to ''' +
SUBSTRING(@physical_name, 1, LEN(@physical_name) - @DotPositionFromRight) +
'_Restored' +
SUBSTRING(@physical_name, LEN(@physical_name) - @DotPositionFromRight + 1, 99) +
''',' + @linefeed
FETCH NEXT FROM Files_Cursor INTO @name, @physical_name
END
CLOSE Files_Cursor
DEALLOCATE Files_Cursor
SET @RestoreDBFromFullBUCommand =
@RestoreDBFromFullBUCommand + '
STATS = 1, replace, norecovery;' +
@linefeed + @linefeed + @linefeed
/* Execute @RestoreDBFromFullBUCommand
command on all online databases on
this SQL Server Instance. */
EXECUTE master.dbo.sp_executesql
@RestoreDBFromFullBUCommand
/* Reinitialize variable(s) */
SET @RestoreDBFromDiffBUCommand = ''
/* Get path to the most recent DIFFERENTIAL database backup. */
SELECT top(1)
@DaysSinceLastDifferentialBackup = DATEDIFF(D,
MAX(b.backup_finish_date), CURRENT_TIMESTAMP),
@DifferentialBackupPath = bm.physical_device_name
FROM master..sysdatabases a
LEFT OUTER JOIN msdb..backupset b ON a.name = b.database_name
LEFT OUTER JOIN msdb..backupmediafamily bm on b.media_set_id =
bm.media_set_id
WHERE
a.name = @database and
b.type = 'I' and
-- Type I = DIFFERENTIAL Backup
b.backup_finish_date > (CURRENT_TIMESTAMP - 1) and
bm.physical_device_name like '%' + @ServerName + '%backup%‘
GROUP BY a.name, b.type, bm.physical_device_name,
b.database_backup_lsn
.
/* If the database does not have differential
backups taken, then RECOVER the database. */
IF @DaysSinceLastDifferentialBackup is NULL
-- No Differential Backup for this DB.
BEGIN -- No Differential Backup for this DB.
/* No Differential backup, then nothing to
do in this block. */
print 'No Differential Backup for this DB.'
SET @RecoverDatabaseCommand = ''
END
ELSE -- This DB has a Differential Backup.
BEGIN
BEGIN TRANSACTION
BEGIN TRY
print '-- Days since last DIFFERENTIAL backup: ' +
cast(@DaysSinceLastDifferentialBackup as varchar) +
@linefeed + @linefeed
print '-- Path to last DIFFERENTIAL backup: ' +
@DifferentialBackupPath + @linefeed + @linefeed
/* Build the @RestoreDBFromDiffBUCommand command. */
SET @RestoreDBFromDiffBUCommand =
@RestoreDBFromDiffBUCommand + 'RESTORE DATABASE [' +
@RestoredDatabaseName + ']' + @linefeed
SET @RestoreDBFromDiffBUCommand =
@RestoreDBFromDiffBUCommand + ' from DISK = ''' +
@DifferentialBackupPath + '''' + @linefeed
SET @RestoreDBFromDiffBUCommand =
@RestoreDBFromDiffBUCommand + ' with' + @linefeed
/* Must get the disk and folder path to the mdf, ldf, and any other
database files...this could be tricky. */
DECLARE Files_Cursor CURSOR FOR
select name, physical_name from sys.master_files where
database_id = db_id(@database)
OPEN Files_Cursor
FETCH NEXT FROM Files_Cursor INTO @name, @physical_name
While @@FETCH_STATUS = 0
BEGIN
SET @DotPositionFromRight = CHARINDEX('.',
REVERSE(@physical_name),1)
SET @RestoreDBFromDiffBUCommand = @RestoreDBFromDiffBUCommand
+ ' move ''' + @name + ''' to ''' +
SUBSTRING(@physical_name, 1, LEN(@physical_name) –
@DotPositionFromRight) + '_Restored' +
SUBSTRING(@physical_name, LEN(@physical_name) –
@DotPositionFromRight + 1, 99) + ''',' + @linefeed
FETCH NEXT FROM Files_Cursor INTO @name, @physical_name
END
CLOSE Files_Cursor
DEALLOCATE Files_Cursor
SET @RestoreDBFromDiffBUCommand = @RestoreDBFromDiffBUCommand + ‘
STATS = 1, replace, norecovery;' + @linefeed + @linefeed + @linefeed
/* Execute the RestoreDBFromDiffBUCommand command on this database. */
EXECUTE master.dbo.sp_executesql @RestoreDBFromDiffBUCommand
/* Reinitialize variable(s) */
SET @RestoreDBFromDiffBUCommand = ''
SET @DaysSinceLastFullBackup = -1
SET @DaysSinceLastDifferentialBackup = NULL
COMMIT TRANSACTION
END TRY
/* RECOVER this database before going on to the next database.
/* Build the @RecoverDatabaseCommand command. */
SET @RecoverDatabaseCommand = 'RESTORE DATABASE [' +
@RestoredDatabaseName + ']' + @linefeed
SET @RecoverDatabaseCommand = @RecoverDatabaseCommand +
' with RECOVERY' + @linefeed + @linefeed
/* Execute the @RecoverDatabaseCommand command. */
EXECUTE master.dbo.sp_executesql @RecoverDatabaseCommand
/* Fetch the "next" result from the query into the cursor. */
FETCH NEXT FROM DatabaseCursor INTO @database
END
/* Close and deallocate the database cursor. */
CLOSE DatabaseCursor
DEALLOCATE DatabaseCursor
*/
2.
/*
-----
Do DBCC CHECKDB on newly-restored databases
====================================================================
Name:
Do DBCC CHECKDB on newly-restored databases
Author:
Robert H. Every
Create date: 10 July 2014
Description: This script gets the name of each database on the SQL
Server instance where the database name like
'Restored_' + @ServerName + '%'.
Then it builds a DBCC CheckDB command script.
Then it executes the DBCC CHECKDB script.
***********************************************************************
** Revision History
***********************************************************************
** Date
Author
Description
** ----------- ---------------------- --------------------------------** dd-MMM-yyyy Reviser Name Goes Here Description goes here...
==================================================================== */
SET NOCOUNT ON
DECLARE
DECLARE
DECLARE
DECLARE
@ServerName varchar(128)
@database varchar(255)
@DBCC_CheckDB_Command varchar(max)
@linefeed CHAR(2)
/* Set the @linefeed variable */
SET @linefeed = CHAR(13) + CHAR(10)
/* Initialize variables. */
SET @ServerName = ''
SET @DBCC_CheckDB_Command = 'use master' + @linefeed
/* Get the server name. */
select @ServerName = convert(nvarchar(128),
serverproperty('servername'));
DECLARE DatabaseCursor CURSOR FOR
SELECT name FROM master.sys.databases sd
WHERE sd.state = 0
-- state = 0 = ONLINE.
and name like 'Restored_' + @ServerName + '%'
order by name
OPEN DataBaseCursor
/* Fetch the "first" database name. */
FETCH NEXT FROM DatabaseCursor INTO @database
WHILE @@FETCH_STATUS = 0
BEGIN
/* Build the @DBCC_CheckDB_Command command. */
SET @DBCC_CheckDB_Command = @DBCC_CheckDB_Command + 'DBCC CHECKDB
([' + @database + ']);' + @linefeed
/* Fetch the "next" database name. */
FETCH NEXT FROM DatabaseCursor INTO @database
END
/* Close and deallocate the database cursor. */
CLOSE DatabaseCursor
DEALLOCATE DatabaseCursor
/* Print the @DBCC_CheckDB_Command string just for kicks. */
print @DBCC_CheckDB_Command
/* Execute the DBCC CheckDB command on all online databases on this SQL
Server Instance. */
EXEC(@DBCC_CheckDB_Command)
use master
DBCC CHECKDB ([Restored_ServerName_DatabaseName-A]);
...
DBCC CHECKDB ([Restored_ServerName_DatabaseName-Z]);
3.
/*
-----
Get date/time of last successful DBCC CHECKDB
====================================================================
Name:
Get date/time of last successful DBCC CHECKDB execution
Author:
Robert H. Every
Create date: 10 July 2014
Description: This script ensures that the master.dbo.DBCCRes table
exists. If it doesn't, then the script creates it.
If it does, then the script truncates it to ensure it
contains no data. Then the script adds a row of data
containing the date/time of the most recent successful
DBCC CHECKDB that was performed on each database whose
name is like 'Restored_' + @ServerName + '%'.
***********************************************************************
** Revision History
***********************************************************************
** Date
Author
Description
** ----------- ---------------------- --------------------------------** dd-MMM-yyyy Reviser Name Goes Here Description goes here...
==================================================================== */
/* Create a temporary table to store some DBCC data */
CREATE TABLE #temp (
Id INT IDENTITY(1,1),
ParentObject VARCHAR(255),
[OBJECT] VARCHAR(255),
Field VARCHAR(255),
[VALUE] VARCHAR(255)
)
/* Ensure that the table table dbo.master.dbo.DBCCRes exists.
use master
go
IF NOT EXISTS (
SELECT *
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = 'dbo' AND
TABLE_TYPE = 'BASE TABLE' AND
TABLE_NAME
= 'DBCCRes'
)
*/
/* The table does NOT exist...create it. */
Begin
print 'Creating table dbo.master.dbo.DBCCRes'
/* This is the permanent table from which the DBCC CHECKDB data will be
selected later. */
CREATE TABLE master.dbo.DBCCRes
(
Id INT IDENTITY(1,1)PRIMARY KEY CLUSTERED,
DBName sysname,
dbccLastKnownGood DATETIME,
RowNum INT
)
End
else
/* The table exists...do NOT create it. Truncate it. */
Begin
print 'The table master.dbo.DBCCRes exists. Truncating it.'
TRUNCATE TABLE master.dbo.DBCCRes
End
DECLARE @DBName SYSNAME
DECLARE @SQL VARCHAR(512)
DECLARE @ServerName varchar(128)
/* Get the server name. */
select @ServerName = convert(nvarchar(128),
serverproperty('servername'));
/* Get the names of “Restored” databases. */
DECLARE dbccpage CURSOR
LOCAL STATIC FORWARD_ONLY READ_ONLY
FOR SELECT name
FROM master.sys.databases
WHERE
state = 0 and
-- state = 0 = ONLINE
name like 'Restored_' + @ServerName + '%';
OPEN dbccpage;
FETCH NEXT FROM dbccpage INTO @DBName;-- Get name of “first” “restored” database.
WHILE @@FETCH_STATUS = 0
BEGIN
/* Put DBCC CHECKDB data into the #temp table. */
SET @SQL = 'Use [' + @DBName +'];' +CHAR(10)+CHAR(13)
SET @SQL = @SQL + 'DBCC Page ( ['+ @DBName +'],1,9,3) WITH TABLERESULTS;'
+CHAR(10)+CHAR(13)
INSERT INTO #temp
EXECUTE (@SQL);
SET @SQL = ''
/* Insert DB name and LastKnownGood date/time data into DBCCRes table. */
INSERT INTO master.dbo.DBCCRes
( DBName, dbccLastKnownGood, RowNum )
SELECT @DBName, VALUE
, ROW_NUMBER() OVER (PARTITION BY Field ORDER BY VALUE) AS Rownum
FROM #temp
WHERE field = 'dbi_dbccLastKnownGood';
TRUNCATE TABLE #temp;
-- Truncate #temp table preparatory for next DB.
FETCH NEXT FROM dbccpage INTO @DBName; -- Get name of “next” online database.
END
CLOSE dbccpage;
DEALLOCATE dbccpage;
/* Drop the #temp table...we're done with it. */
DROP TABLE #temp
/* The next line is NOT part of the job step. */
/* Wanna see what’s in the DBCCRes table? */
SELECT * FROM [master].[dbo].[DBCCRes] WHERE RowNum = 1
Id DBName
dbccLastKnownGood
RowNum
5 Restored_ServerName_ReportServer
2016-02-19 12:35:00.000
1
6 Restored_ServerName_ReportServerTempDB
2016-02-19 12:35:02.000
1
4.
Email DBCC CHECKDB results to DBA
/*
-----
====================================================================
Name:
Email DBCC CHECKDB results to DBA operator
Author:
Robert H. Every
Create date: 10 July 2014
Description: This script selects one row for each database from the
master.dbo.DBCCRes table and emails the results to the
DBA operator. The results are an email attachment.
***********************************************************************
** Revision History
***********************************************************************
** Date
Author
Description
** ----------- ---------------------- --------------------------------** dd-MMM-yyyy Reviser Name Goes Here Description goes here...
==================================================================== */
/* Declare variables */
DECLARE @eMailMsgBody varchar(4000)
DECLARE @linefeed CHAR(2)
/* Set the @linefeed variable */
SET @linefeed = CHAR(13) + CHAR(10)
/* Create the email message. */
SET @eMailMsgBody = 'The attached
CHECKDB succeeded on each DB.'
SET @eMailMsgBody = @eMailMsgBody
SET @eMailMsgBody = @eMailMsgBody
SET @eMailMsgBody = @eMailMsgBody
file contains DB names and the last time a DBCC
+ @linefeed +@linefeed
+ 'Robert Every, FLMI, ACS' + @linefeed
+ '(800) 555-1212'
/* Send the mail. */
EXEC msdb.dbo.sp_send_dbmail
@profile_name = 'SQL Alerts',
@recipients = '[email protected]',
@subject = 'Restore-tested DB names and successful DBCC CHECKDB dates attached',
@body = @eMailMsgBody,
/* Write the query to get the database names and the date/time of the last successful
DBCC CHECKDB was executed on each database. */
@query = 'SELECT DBName, dbccLastKnownGood as [Successful Consistency Check]
FROM master.dbo.DBCCRes
WHERE RowNum = 1;' ,
@attach_query_result_as_file = 1 ;
Contents of the emailed file.
DBName
----------------------------------------Restored_ServerName_ReportServer
Restored_ServerName_ReportServerTempDB
(23 rows affected)
Successful Consistency Check
---------------------------2016-02-19 12:34:59.920
2016-02-19 12:35:01.967
5.
/*
-----
Delete the restore-tested databases
====================================================================
Name:
Delete the restore-tested and consistency-checked databases
Author:
Robert H. Every
Create date: 10 July 2014
Description: This script gets the name of each database on the SQL
Server instance where the database name is like
'Restored_' + @ServerName + '%'...
Then it deletes (drops) each of these databases.
***********************************************************************
** Revision History
***********************************************************************
** Date
Author
Description
** ----------- ---------------------- --------------------------------** dd-MMM-yyyy Reviser Name Goes Here Description goes here...
==================================================================== */
SET NOCOUNT ON
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
DECLARE
@ServerName varchar(128)
@database varchar(255)
@DeleteBackupHistoryCommand varchar(max)
@SetSingleUserCommand varchar(max)
@Delete_DB_Command varchar(max)
@linefeed CHAR(2)
/* Set the @linefeed variable */
SET @linefeed = CHAR(13) + CHAR(10)
/* Initialize variables. */
SET @ServerName = ''
SET @Delete_DB_Command = ''
SET @DeleteBackupHistoryCommand
= ''
/* Get the server name. */
select @ServerName = convert(nvarchar(128),
serverproperty('servername'));
DECLARE DatabaseCursor CURSOR FOR
SELECT name FROM master.sys.databases sd
WHERE sd.state = 0
-- state = 0 = ONLINE.
and name like 'Restored_' + @ServerName + '%'
order by name
OPEN DataBaseCursor
FETCH NEXT FROM DatabaseCursor INTO @database
WHILE @@FETCH_STATUS = 0
BEGIN
/* Delete any backup history for this database. */
SET @DeleteBackupHistoryCommand =
'EXEC msdb.dbo.sp_delete_database_backuphistory ' + '''' + @database + ''''
EXEC(@DeleteBackupHistoryCommand)
/* Set this database to single-user mode. */
SET @SetSingleUserCommand =
'ALTER DATABASE [' + @database + '] SET SINGLE_USER WITH ROLLBACK IMMEDIATE'
EXEC(@SetSingleUserCommand )
/* Delete (i.e., drop) this database. */
SET @Delete_DB_Command = 'DROP DATABASE [' + @database + ']'
EXEC(@Delete_DB_Command)
/* Reinitialize command variables. */
SET @DeleteBackupHistoryCommand = ''
SET @SetSingleUserCommand = ''
SET @Delete_DB_Command = ''
/* Fetch the "next" result from the query into the cursor. */
FETCH NEXT FROM DatabaseCursor INTO @database
END
/* Close and deallocate the database cursor. */
CLOSE DatabaseCursor
DEALLOCATE DatabaseCursor
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