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  • MySQL经典练习题(五)

    1、以班号和年龄从大到小的顺序查询Student表中的全部记录。

    select *

    from student

    order by class desc,sbirthday ;

    2、查询“男”教师及其所上的课程。

    -- 方法一

    select tname,t.TNO,t.tsex

    from teacher t,course c

    where t.TSEX='男'and t.tno =c.tno

    -- 方法二

    select tname,t.TNO,t.tsex

    from teacher t inner join course c

    on t.tsex ='男'and t.tno = c.tno

    3、查询最高分同学的Sno、Cno和Degree列。

    select sno,cno,degree

    from score

    where degree = (select max(degree) from score)

    4、查询和“李云”同性别的所有同学的Sname.

    select  sname

    from student

    where ssex = (select ssex from student where sname='李云')

    5、查询和“李云”同性别并同班的同学Sname.

    select  sname

    from student

    where ssex = (select ssex from student where sname='李云') and class =(select class from student where sname='李云')

    6、查询所有选修“计算机导论”课程的“男”同学的成绩表

    select *

    from score

    where sno in (select sno from student where ssex='男' and sno in(

    select sno from score where sno in (select sno from score where cno = (select cno from course where cname='计算机导论'))))

    order by sno

    欢迎批评指正,提出问题,谢谢!
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  • 原文地址:https://www.cnblogs.com/xxeleanor/p/14952585.html
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