GROUP BY student_score.studentid HAVING a>=85 题目27:查询课程名称为「数学」,且分数低于 60 的学生姓名和分数 分析: 这个应该是多表查询 student , student_course, student_score 三个表查询 SELECT student.id,student_course.coursename, student.stdentname,student_score.score FROM student_course, stude...