誰能幫幫我,弄了半天也沒法解決,在線等待....
１、alter table pexamdetail add col char(20) default ''
２、alter table pexamdetail drop col
我用第１時可以建立，但用２時就出錯了，信息如下：
Server: Msg 3728, Level 16, State 1, Line 1
'col' is not a constraint.
Server: Msg 3727, Level 16, State 1, Line 1
Could not drop constraint. See previous errors.
不知是怎麼回事，那位能幫忙解答，謝了
[368 byte] By [stevenqi] at [2008-2-13] 