mssql row_number和partition by分组取排名前3数据

我们经常会要统计一个表中前几名学习成绩好的记录，下面我们利用了sql的row_number()函数，row_number()函数的分组排序功能使这种操作变得非常简单的，有需要的朋友参考一下。

代码如下

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--1.创建测试表 create table #score (     name varchar(20),     subject varchar(20),     score int ) --2.插入测试数据 insert into #score(name,subject,score) values('张三','语文',98) insert into #score(name,subject,score) values('张三','数学',80) insert into #score(name,subject,score) values('张三','英语',90) insert into #score(name,subject,score) values('李四','语文',88) insert into #score(name,subject,score) values('李四','数学',86) insert into #score(name,subject,score) values('李四','英语',88) insert into #score(name,subject,score) values('李明','语文',60) insert into #score(name,subject,score) values('李明','数学',86) insert into #score(name,subject,score) values('李明','英语',88) insert into #score(name,subject,score) values('林风','语文',74) insert into #score(name,subject,score) values('林风','数学',99) insert into #score(name,subject,score) values('林风','英语',59) insert into #score(name,subject,score) values('严明','英语',96) --3.取每个学科的前3名数据 * from (     select subject,name,score,ROW_NUMBER() over(PARTITION by subject order by score desc) as num from #score ) T where T.num --4.删除临时表 truncate table #score drop table #score