摘要: select * from table a1 where rowid = ( select max(rowid) from table a2 where a2.id_subject_cost=a1.id_subject_cost and a2.cost=a1.cost) 阅读全文
posted @ 2013-10-21 14:13 李小加 阅读(297) 评论(0) 推荐(0) 编辑