mysql子查询联系

1.横向显示学生所学课程的成绩（例如：学生姓名、学生课程1的分数、学生课程2的分数） select s_name,a.s_score,b_score from (select s_id,s_score from Score where c_id = 1) as a left join (select s_id,s_score from Score where c_id = 2) as b on b

>>阅读原文<<