sqlserver 统计sql语句大全收藏

sqlserver 统计统计sql语句大全收藏语句大全收藏

SQL统计大全收藏,主要是一些实现统计功能常用的代码,希望对需要的朋友有所帮助.

1.计算每个人的总成绩并排名计算每个人的总成绩并排名

select name,sum(score) as allscore from stuscore group by name order by allscore

2.计算每个人的总成绩并排名计算每个人的总成绩并排名

select distinct t1.name,t1.stuid,t2.allscore from stuscore t1,( select stuid,sum(score) as allscore from stuscore group by

stuid)t2where t1.stuid=t2.stuidorder by t2.allscore desc

3. 计算每个人单科的最高成绩计算每个人单科的最高成绩

select t1.stuid,t1.name,t1.subject,t2.maxscore from stuscore t1,(select subject,max(score) as maxscore from stuscore group

by subject) t2where t1.subject=t2.subject and t1.score=t2.maxscore

6.列出各门课程成绩最好的两位学生列出各门课程成绩最好的两位学生

select distinct t1.* from stuscore t1 where t1.id in (select top 2 stuscore.id from stuscore where subject = t1.subject order by

score desc) order by t1.subject

7.学号学号 姓名姓名 语文语文 数学数学 英语英语 总分总分 平均分平均分

select stuid as 学号,name as 姓名,sum(case when subject='语文' then score else 0 end) as 语文,sum(case when subject='数

学' then score else 0 end) as 数学,sum(case when subject='英语' then score else 0 end) as 英语,sum(score) as 总分,

(sum(score)/count(*)) as 平均分from stuscoregroup by stuid,name order by 总分desc

8.列出各门课程的平均成绩列出各门课程的平均成绩

学'order by score desc

10. 列出数学成绩在列出数学成绩在2-3名的学生名的学生

select t3.* from(select top 2 t2.* from (select top 3 name,subject,score,stuid from stuscore where subject='数学'order by

score desc) t2 order by t2.score) t3 order by t3.score desc

11. 求出李四的数学成绩的排名求出李四的数学成绩的排名

declare @tmp table(pm int,name varchar(50),score int,stuid int)insert into @tmp select null,name,score,stuid from stuscore

where subject='数学' order by score descdeclare @id intset @id=0;update @tmp set @id=@id+1,pm=@idselect * from

@tmp where name='李四'

12. 课程课程 不及格（不及格（-59）） 良（良（-80）） 优（优（-100））

select subject, (select count(*) from stuscore where score<60 and subject=t1.subject) as 不及格,(select count(*) from