苟有恒何必三更眠五更起     最无益莫过一日曝十日寒

摘要: 1、将如下表中的每门成绩都大于80分的人名? select * from tb_stu2;select distinct stu2_name from tb_stu2 where stu2_name not in(select distinct stu2_name from tb_stu2 wher 阅读全文
posted @ 2017-04-10 22:09 月魄 阅读(337) 评论(0) 推荐(0) 编辑