SQL删除不了相同的记录

Question

stuid 是什么类型的字段?不会是浮点吧!!:)

Answer 1

用“desc tablename”把表结构定义打出来看一下！

Answer 2

0 StuID varchar 50 0
0 StuName varchar 30 0
0 c_Sex smallint 2 1
0 BornTime datetime 8 1
0 c_Native smallint 2 1
0 NativePlace varchar 256 1
0 c_ZZMM smallint 2 1
0 InTime datetime 8 1
0 Health char 10 1
0 Height int 4 1
0 c_FamilyArea smallint 2 1
0 Address varchar 256 1
0 JuWei varchar 256 1
0 Zip int 4 1
0 Phone varchar 256 1
0 InCome numeric 9 1
0 MoneySource varchar 256 1
0 Photo image 16 1
0 ClassID varchar 20 1
0 c_Status smallint 2 0
0 Normal varchar 10 1
0 ywMark numeric 9 1
0 sxMark numeric 9 1
0 enMark numeric 9 1
0 wlMark numeric 9 1
0 hxMark numeric 9 1
0 peMark numeric 9 1
0 zzMark numeric 9 1
0 Memo varchar 1024 1

Answer 3

用delete from stubase where stuid='9902052'又不行删除就出错，
但我用delete from stubase where stuid='9902052' and stuname='段国庆'它就可以删除！
出错信息是什么呀