查找前几名

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1. 查找前几名

--25、查询各科成绩前三名的记录:(不考虑成绩并列情况) --不考虑重复

SELECT courseid,score,row_number() OVER

(PARTITION BY courseid ORDER BY score DESC) AS rn FROM tblScore

--考虑重复

SELECT courseid,score,dense_rank() OVER

(PARTITION BY courseid ORDER BY score DESC) AS rn FROM tblScore

查找前几名

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原文地址：http://www.cnblogs.com/cfb513142804/p/4232263.html