数据库---学生选课查询案例---经典查询题

语句见下方 –1、查询"c10"课程比"c20"课程成绩高的学生的信息及课程分数 select s.,sc1.score as c10成绩,sc2.score as c20成绩 --sql 92 写法 from student s,sc sc1,sc sc2 where sc1.s# = sc2.s# and s.s# = sc1.s# and (sc1.c# = ‘c10’ and sc2.c#

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