sql="update [songhua] set ToName='"&Toname&"',posttime='"&now()&"' where posttime=(select top 1 posttime from [songhua] where datediff('d',posttime,now()) > days)"
sql="update [songhua] set ToName='"&Toname&"',posttime='"&now()&"' where posttime=(select top 1 posttime from [songhua] where datediff('d',posttime,now()) > days)"