摘要: 1、查询“001”课程比“002”课程成绩高的所有学生的学号; select a.S# from (select s#,score from SC where C#='001') a,(select s#,score from SC where C#='002') b where a.score>b.score and a.s#=b.s#; 阅读全文
posted @ 2010-05-11 11:04 ∮随风而行∮ 阅读(452) 评论(0) 推荐(0) 编辑