mysql,求每组前N条记录
摘要:直接上代码 select name, subject, score from( select (@i:=case when @subject_pre=t1.subject then @i+1 else 1 end) as rn, t1.name, t1.subject, t1.score, (@su
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posted @ 2023-06-27 16:35
posted @ 2023-06-27 16:35
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