摘要: 通过以下例子说明: insert B(a,b,c,d,e) select aa,bb,cc,dd,ee from A 阅读全文
posted @ 2008-10-06 20:51 missthe 阅读(449) 评论(0) 推荐(0) 编辑
摘要: 假设表名:e_custom 相同记录的字段:usn select * from e_custom where usn in (select usn from e_custom group by usn having count(*)>1) 阅读全文
posted @ 2008-10-06 20:48 missthe 阅读(364) 评论(0) 推荐(0) 编辑