复制代码 代码如下:

use master

declare @DbName varchar(60)

declare @BackSql varchar(1000)

declare myCursor cursor for

SELECT [name] FROM SYSDATABASES

where [name] not in ('master','model','msdb','tempdb')

order by [name]

open myCursor

fetch next from myCursor into @DbName

while(@@FETCH_STATUS = 0)

begin

if datename(weekday, getdate())='星期三' --每周三覆盖上周三的

begin

select @BackSql='Backup DATABASE ['+@DbName+'] to disk=''E:DbBackUp'+@DbName+'星期三.bak'' with format'

end

else--每天覆盖上一天的

begin

select @BackSql='Backup DATABASE ['+@DbName+'] to disk=''E:DbBackUp'+@DbName+'AutoBack.bak'' with format'

end

exec(@BackSql)

fetch next from myCursor into @DbName

end

close myCursor

DEALLOCATE myCursor