做数据库备份，自动删除前几天的备份文件用的，谁知道？谢谢
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backup database有个EXPIREDATE参数,可以设置备份集过期的日期.
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- SQL code
/*******************完整备份作业*******************/--完整备份,每周一次USE MasterGOdeclare @str varchar(100)set @str='D:\DBtext\jgj\DBABak\FullBak'+replace(replace(replace(convert(varchar,getdate(),20),'-',''),' ',''),':','')+'.bak'BACKUP DATABASE [demo] TO [email protected]WITH RETAINDAYS=15,NOFORMAT,NOINIT,NAME=N'Demo完整备份',SKIP,NOREWIND,NOUNLOAD,STATS=10GO/*******************差异备份作业*******************/--截断日志USE MasterGOBACKUP LOG Demo WITH NO_LOGGO--收缩日志文件USE DemoGODBCC SHRINKFILE (N'Demo_log',0,TRUNCATEONLY)GO--差异备份,每天一次USE MasterGOdeclare @str varchar(100)set @str='D:\DBtext\jgj\DBABak\DiffBak'+replace(replace(replace(convert(varchar,getdate(),20),'-',''),' ',''),':','')+'.diff'BACKUP DATABASE [Demo] TO [email protected]WITH DIFFERENTIAL,RETAINDAYS=8,NOFORMAT,NOINIT,NAME=N'Demo差异备份',SKIP,NOREWIND,NOUNLOAD,STATS=10GO/******************日志备份作业*******************/--日志备份,每小时一次USE DemoGOdeclare @str varchar(100)set @str='D:\DBtext\jgj\DBABak\logbak'+replace(replace(replace(convert(varchar,getdate(),20),'-',''),' ',''),':','')+'.trn'BACKUP LOG [Demo] TO [email protected]WITH RETAINDAYS=3,NOFORMAT,NOINIT,NAME=N'Demo日志备份',SKIP,NOREWIND,NOUNLOAD,STATS=10GO--删除过期的备份文件,每天两次declare @str varchar(100),@dir varchar(100),@fileName varchar(30)set @dir='del D:\DBtext\jgj\DBABak\'set @filename=left(replace(replace(replace(convert(varchar,getdate()-15,20),'-',''),' ',''),':',''),8)set @[email protected][email protected]+'*.bak'exec xp_cmdshell @strset @filename=left(replace(replace(replace(convert(varchar,getdate()-8,20),'-',''),' ',''),':',''),8)set @[email protected][email protected]+'*.diff'exec xp_cmdshell @strset @filename=left(replace(replace(replace(convert(varchar,getdate()-8,20),'-',''),' ',''),':',''),8)set @[email protected][email protected]+'*.trn'exec xp_cmdshell @str
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