mysql子查詢聯繫

1.橫向顯示學生所學課程的成績（例如：學生姓名、學生課程1的分數、學生課程2的分數） 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

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