数据清空和备份,该怎么解决

数据清空和备份
db 一共三个表table1,table2,table3 都有字段Date（yyyyMMdd) 
我现在想以年月为条件做清空、备份、恢复，怎么写

[解决办法]

SQL code

delete table1 where date between '2010-01-01' and '2010-12-31'delete table2 where date between '2010-01-01' and '2010-12-31'delete table3 where date between '2010-01-01' and '2010-12-31'备份用 backup database恢复用 restore
[解决办法]
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 DISK=@strWITH 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 DISK=@strWITH 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 DISK=@strWITH 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 @str=@dir+'fullbak'+@filename+'*.bak'exec xp_cmdshell @strset @filename=left(replace(replace(replace(convert(varchar,getdate()-8,20),'-',''),' ',''),':',''),8)set @str=@dir+'diffbak'+@filename+'*.diff'exec xp_cmdshell @strset @filename=left(replace(replace(replace(convert(varchar,getdate()-8,20),'-',''),' ',''),':',''),8)set @str=@dir+'logbak'+@filename+'*.trn'exec xp_cmdshell @str