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SQL Server 2005 backup on multiple Databases in one go

Posted on 2011-03-17
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Last Modified: 2012-05-11
I have 23 databases in one instance of SQL Server 2005 that i want to backup in one go.

Please help
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Question by:mamlaide
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4 Comments
 
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Expert Comment

by:dan_mason
ID: 35159907
This is the stored procedure I use: does everything in one go.

Note that you need to set a table up before running it - info is in the notes.
CREATE Procedure [dbo].[spBackupAllDatabases]
@Path	varchar(128) ,
@Type	varchar(4)	-- Full / Log
as
/*
Backup file format
<dbname>_Full_yyyymmdd_hhmmss.bak
<dbname>_Log_yyyymmdd_hhmmss.bak

Example:
EXEC Admin.dbo.spBackupAllDatabases 'C\SQLbackups\','Full'
*/
/*
Before you use, set this table up on the DB you're creating the sproc on: 

Create table DatabaseBackup
	(
	Name			varchar(128) primary key nonclustered ,
	BackupFlagFull		varchar(1) not null check (BackupFlagFull in ('Y','N')) ,
	BackupFlagLog		varchar(1) not null check (BackupFlagLog in ('Y','N')) ,
	RetentionPeriodFull	datetime not null ,
	RetentionPeriodLog	datetime not null
	)
*/
set nocount on
declare	@sql varchar(1000)
	
	-- Get all database names
	create table #DBName
		(
		ID		int identity (1,1) ,
		Name		varchar(128) not null ,
		RetentionPeriod	datetime null
		)
	
	insert	#DBName
		(Name)
	select	name
	from	master..sysdatabases
	
	-- Include any new databases in the backup
	insert	DatabaseBackup
		(
		Name ,
		BackupFlagFull ,
		BackupFlagLog ,
		RetentionPeriodFull ,
		RetentionPeriodLog
		)
	select	#DBName.Name ,
		'Y' ,
		'N' ,
		'7 jan 1900' ,		-- default one week
		'1 jan 1900'
	from	#DBName
		left outer join DatabaseBackup
			on DatabaseBackup.Name = #DBName.Name
	where	DatabaseBackup.Name is null
	and	lower(#DBName.Name) <> 'tempdb'
	
	-- Remove any non-existant databases
	delete	DatabaseBackup
	where not exists
		(
		select	*
		from	#DBName
		where	#DBName.Name = DatabaseBackup.Name
		)
	
	delete	#DBName
	
	create table #ExistingBackups
		(
		Name varchar(128) ,
		ID int identity (1,1)
		)
	
	-- loop through databases
declare	@Name 			varchar(128) ,
	@RetentionPeriod	datetime ,
	@LastBackupToKeep	varchar(8) ,
	@ID			int ,
	@MaxID			int	
	
	insert	#DBName
		(Name, RetentionPeriod)
	select	Name, case when @Type = 'Full' then RetentionPeriodFull else RetentionPeriodLog end
	from	DatabaseBackup
	where	(@Type = 'Full' and BackupFlagFull = 'Y')
	or	(@Type = 'Log' and BackupFlagLog = 'Y')
	
	select	@MaxID 	= max(ID) ,
		@ID	= 0
	from	#DBName
	
	while @ID < @MaxID
	begin
		-- get next database to backup
		select	@ID = min(ID) from #DBName where ID > @ID
		
		select 	@Name = Name ,
			@RetentionPeriod = RetentionPeriod
		from 	#DBName
		where	ID = @ID
		
		-- Delete old backups
		delete	#ExistingBackups
		select 	@sql = 'dir /B ' + @Path
		select	@sql = @sql + @Name + '_' + @Type + '*.*'
		
		insert	#ExistingBackups exec master..xp_cmdshell @sql
		
		if exists (select * from #ExistingBackups where Name like '%File Not Found%')
			delete #ExistingBackups
		
		select 	@LastBackupToKeep = convert(varchar(8),getdate() - @RetentionPeriod,112)
		delete	#ExistingBackups where Name > @Name + '_' + @Type + '_' + @LastBackupToKeep

declare	@eID	int ,
	@eMaxID	int ,
	@eName	varchar(128)
		
		-- loop round all the out of date backups
		select	@eID = 0 ,
			@eMaxID = coalesce(max(ID), 0)
		from	#ExistingBackups
		
		while @eID < @eMaxID
		begin
			select 	@eID = min(ID) from #ExistingBackups where ID > @eID
			select	@eName = Name from #ExistingBackups where ID = @eID
			
			select @sql = 'del ' + @Path + @eName
			exec master..xp_cmdshell @sql
		end
		delete	#ExistingBackups
	
		-- now do the backup
		select @sql = @Path + @Name + '_' + @Type + '_' 
					+ convert(varchar(8),getdate(),112) + '_' 
					+ replace(convert(varchar(8),getdate(),108),':','') + '.bak'
		if @Type = 'Full'
			backup database @Name
			to disk = @sql
		else
			backup log @Name
			to disk = @sql
	end

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Author Comment

by:mamlaide
ID: 35160026
Hi Dan Mason,

I am kind of a novice in sql server. Can you give a more simplier solution or explain this solution very well to me (i mean the code) so i could try to implement it.

Thanks
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Author Comment

by:mamlaide
ID: 35160157
Also what about if i have to do differential backups other than full or log
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LVL 6

Accepted Solution

by:
dan_mason earned 500 total points
ID: 35160876
The code is quite difficult to explain in simpler terms: there are explanations dotted through the code, on the lines that are commented out (will appear green in SSMS if you paste it in), but if you were to execute it as it is, and then run the bit in the "CREATE TABLE" subsection, you could then run this:

EXEC Admin.dbo.spBackupAllDatabases 'C\SQLbackups\','Full'

And all your databases would be backed up to C:\SQLbackups

To then do differential backups, you'd want to add a section around line 145:

ELSE IF @Type="Diff"
backup database @Name TO DISK = @sql WITH DIFFERENTIAL

Then you would execute the procedure as before but with Diff instead:
EXEC Admin.dbo.spBackupAllDatabases 'C\SQLbackups\','Diff'


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