摘要: 1、查询"01"课程比"02"课程成绩高的学生的信息及课程分数select * from score sc1,score sc2 where sc1.c_id='01' and sc2.c_id='02'and sc1.s_id = sc2.s_id and sc1.score > sc2.scor 阅读全文
posted @ 2020-09-10 15:59 旺仔木子李 阅读(268) 评论(0) 推荐(0)