sql语句查询成绩表各科前三名
时间:2021-07-01 10:21:17
帮助过:18人阅读
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解释: 根据COL1分组,在分组内部根据 COL2排序,而此函数计算的值就表示每组内部排序后的顺序编号(组内连续的唯一的)
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常用的使用场景: 取每个学科的前3名
--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
select *
from
(
select subject,name,score,ROW_NUMBER() over(PARTITION by subject order by score desc) as num from #score
) T where T.num <= 3
order by subject
--4.删除临时表 drop table
#score
结果:
sql语句查询成绩表各科前三名
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