sqlserver 自动备份所有数据库的SQL

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