嵌套查询

嵌套查询 select snamefrom student where sno in( select sno from sc where cno=‘002’);web --查询与'刘晨'在同一个系学习的学生select*from `+student`where sdept in(select sdeptfrom `student`where sname='刘晨') 查询选修课程名为’信息系统‘

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