sqlserver 統計sql語句大全收藏

1.計算每個人的總成績並排名

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

2.計算每個人的總成績並排名

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. 計算每個人單科的最高成績

select t1.stuid,t1.name,t1.subject,t1.score from stuscore t1,(select stuid,max(score) as maxscore from stuscore group by stuid) t2where t1.stuid=t2.stuid and t1.score=t2.maxscore

4.計算每個人的平均成績

select distinct t1.stuid,t1.name,t2.avgscore from stuscore t1,(select stuid,avg(score) as avgscore from stuscore group by stuid) t2where t1.stuid=t2.stuid

5.列出各門課程成績最好的學生

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.列出各門課程成績最好的兩位學生

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.學號 姓名 語文 數學 英語 總分 平均分

select stuid as 學號,name as 姓名,sum(case when subject='語文' then score else 0 end) as 語文,sum(case when subject='數學' then score else 0 end) as 數學,sum(case when subject='英語' then score else 0 end) as 英語,sum(score) as 總分,(sum(score)/count(*)) as 平均分from stuscoregroup by stuid,name order by 總分desc

8.列出各門課程的平均成績

select subject,avg(score) as avgscore from stuscoregroup by subject

9.列出數學成績的排名

declare @tmp table(pm int,name varchar(50),score int,stuid int)insert into @tmp select null,name,score,stuid from stuscore where subject='數學' order by score descdeclare @id intset @id=0;update @tmp set @id=@id+1,pm=@idselect * from @tmp

select DENSE_RANK () OVER(order by score desc) as row,name,subject,score,stuid from stuscore where subject='數學'order by score desc

10. 列出數學成績在2-3名的學生

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

11. 求出李四的數學成績的排名

declare @tmp table(pm int,name varchar(50),score int,stuid int)insert into @tmp select null,name,score,stuid from stuscore where subject='數學' order by score descdeclare @id intset @id=0;update @tmp set @id=@id+1,pm=@idselect * from @tmp where name='李四'

12. 課程 不及格（-59） 良（-80） 優（-100）

select subject, (select count(*) from stuscore where score<60 and subject=t1.subject) as 不及格,(select count(*) from stuscore where score between 60 and 80 and subject=t1.subject) as 良,(select count(*) from stuscore where score >80 and subject=t1.subject) as 優from stuscore t1 group by subject

13. 數學:張三(50分),李四(90分),王五(90分),趙六(76分)

declare @s varchar(1000)set @s=''select @s =@s+','+name+'('+convert(varchar(10),score)+'分)' from stuscore where subject='數學' set @s=stuff(@s,1,1,'')print '數學:'+@s