这是表数据
用一条sql语句写出每门课程分数都大于80的学生:
SELECT count(*) as total,name
FROM h_stu
WHERE (fenshu BETWEEN 82 and 100) GROUP BY name
HAVING total=3;
SELECT count(*) as total,name
FROM h_stu
WHERE fenshu>80 GROUP BY name
HAVING total=3;
DESC SELECT * from h_stu WHERE fenshu BETWEEN 90 AND 100 —当fenshu上有索引的时候用between 代替>比较好