MSSQL Server2012备份所有数据库到网络共享盘上面,并自动删除几天前的备份。。

1备份当前MSQL所有数据库

--要备份到哪一服务的IP网络位置，要提前打开文件夹共享.这里还要输入用户名和密码,下面这一行是建立共享

exec master..xp_cmdshell 'net use \192.168.8.108DBBak Password /user:192.168.1.108administrator',NO_OUTPUT

go

declare @s nvarchar(200),@del nvarchar(200)
select @s='',@del=''

--自动备份，并删除4天前的备份。可以随意改数字.
declare datebak cursor for
select 
[bak]='backup database '+quotename(Name)+' to disk =''\192.168.8.108DBBak'+Name+'('+convert(varchar(10),getdate(),120)+')'+'.bak'' with init',
[del]='exec master..xp_cmdshell '' del \192.168.8.108DBBak'+Name+'('+convert(varchar(10),getdate()-4,120)+')'+'.bak'', no_output' 
from master..sysdatabases where dbid>4 --不备份系统数据库
open datebak


fetch next from datebak into @s,@del
while @@fetch_status=0
begin
exec (@del)
exec(@s)
fetch next from datebak into @s,@del
end
close datebak
deallocate datebak
go

--删除共享链接

exec master..xp_cmdshell 'net use \192.168.8.108DBBak/delete'

go

2.备份指定的几个数据到网络盘

declare @DBName nvarchar(max)
declare @BakName nvarchar(max)

--建立(打开)共享目录
exec master..xp_cmdshell 'net use \192.168.1.100MSSQLDBBak  Password /user:192.168.1.100administrator'

Declare DBCursor CURSOR 
FORWARD_ONLY READ_ONLY
--要删除的指定数据库名称在下面用union select拼接 
For (
 select '[DB1]' as DBName 
 union select '[DB2]' as DBName

)
open DBCursor
fetch next from DBCursor into @DBName
while (@@fetch_status=0)
    begin
    --print @DBName
    --select @DBName='[LFBMP.PO]'
    --指定保存路径本地目录    
    --select @BakName='D:MSSQLDBBakBC_'+REPLACE(@DBName,'.','_')+Convert(char(10),getdate(),120)+'.bak'
　　 --指定保存到网络共享目录
    select @BakName='\192.168.1.100MSSQLDBBak'+REPLACE(@DBName,'.','_')+Convert(char(10),getdate(),120)+'.bak'
    declare @BakSQL nvarchar(max)
    --select @BakSQL='Backup Database '+@DBName+' To disk='''+@BakName+''''
    select @BakSQL='Backup Database '+@DBName+' To disk='''+@BakName+'''  with init,nounload '
    print @BakSQL
    exec (@BakSQL)
    fetch next from DBCursor into @DBName
    end
close DBCursor
deallocate DBCursor

--删除(关闭)共享目录
exec master..xp_cmdshell 'net use \192.168.1.100MSSQLDBBak /delete'



--修改密码，重新执行以下代码
--exec master..xp_cmdshell 'net use \192.168.1.100MSSQLDBBak Password /user:192.168.1.100administrator'
--删除(关闭)共享目录
--exec master..xp_cmdshell 'net use \192.168.1.100R910MSSQLDBBak /delete'