SQL SERVER 自动备份并且自动删除过期备份

 

use master

--获取完整备份文件名(每周日做完整备份，其它时间每天做差异备份)

declare @filename nvarchar(100)

set @filename=N'D:\数据库备份\TestDB'+convert(char(8),DATEADD(wk, DATEDIFF(wk,0,getdate()), -1),112)+'.bak'

print @filename

--完整备份

if(DatePart(dw,getdate())=1)

begin

BACKUP DATABASE [TestDB] TO DISK = @filename WITH NOINIT , NOUNLOAD , NAME = N'TestDB 备份', NOSKIP , STATS = 10, NOFORMAT

end

else

begin

--差异备份

BACKUP DATABASE [TestDB] TO DISK =@filename WITH DIFFERENTIAL

end

--删除30天前备份

EXEC xp_cmdshell ''FORFILES /p d:数据库备份 /s /m TestDB*.bak /d -30 /c "CMD /C del /Q /F @FILE"''

GO