小编整理“计算机考研数据库知识点：嵌套查询”相关内容，一起来看。

　　IN引出的子查询

　　SELECT Sno,Sname FROM Students WHERE Sex = '女' AND Speciality IN (

　　SELECT Speciality FROM Students WHERE Sname ='王丽丽'

　　);

　　集合的比较引出的子查询

　　SELECT Sno,Sname,Speciality,Birthday FROM Students WHERE Speciality <> '软件工程' AND Birthday > ALL(

　　SELECT Birthday FROM Students WHERE Speciality = '软件工程'

　　);

　　存在量词引出的子查询

　　SELECT Sno,Sname FROM Students S WHERE EXISTS (

　　SELECT * FROM SC WHERE Sno=S.Sno AND Cno = 'CS403');