Student(S#,Sname)
Cource(C#,Cname)
SC(S#,C#,score)
Teacher(T#,Tname)
要求查询001课程比002课程成绩高的所有学生的学号,请教各位大虾如何写SQL语句?
------解决方案--------------------------------------------------------
- SQL code
select a.S#from SC a ,SC bwhere a.S#=b.S#and a.C#='001'and b.C#='002'and a.score>b.score