最近遇到一个关于mysql的查询的问题，就是在成绩表里查询各科成绩都在80以上(含80分)的学生姓名，在网上找了一个例子，供大家参考学习：
1、
2、也有人在网上用了别外的办法来查找，如下：
使用了分组group by,
SELECT D.name FROM (
SELECT S.name,S.score AS ITEM1,S1.score AS ITEM2,S2.score AS ITEM3
FROM Student S
inner join Student S1 on S.name = S1.name and S.course <> S1.course
inner join Student S2 on S.name = S2.name and S.course <> S2.course
WHERE S.score>=80 and S1.score>=80 and S2.score>=80
) D
GROUP BY D.name