姓名:name
|
课程:subject
|
分数:score
|
学号:stuid
|
张三
|
数学
|
89
|
1
|
张三
|
语文
|
80
|
1
|
张三
|
英语
|
70
|
1
|
李四
|
数学
|
90
|
2
|
李四
|
语文
|
70
|
2
|
李四
|
英语
|
80
|
2
|
学号
|
姓名
|
语文
|
数学
|
英语
|
总分
|
平均分
|
|
|
|
|
|
|
|
课程
|
不及格(0-59)个
|
良(60-80)个
|
优(81-100)个
|
|
|
|
|
13. 数学:张三(50分),李四(90分),王五(90分),赵六(76分)
set @s=''
select @s =@s+','+name+'('+convert(varchar(10),score)+'分)' from stuscore where subject='数学'
set @s=stuff(@s,1,1,'')
print '数学:'+@s
(
select stuid,sum(score) as allscore from stuscore group by stuid
)t2
where t1.stuid=t2.stuid
order by t2.allscore desc
(
select stuid,max(score) as maxscore from stuscore group by stuid
) t2
where t1.stuid=t2.stuid and t1.score=t2.maxscore
(
select stuid,avg(score) as avgscore from stuscore group by stuid
) t2
where t1.stuid=t2.stuid
(
select subject,max(score) as maxscore from stuscore group by subject
) t2
where t1.subject=t2.subject and t1.score=t2.maxscore
where t1.stuid in
(select top 2 stuscore.stuid from stuscore where subject = t1.subject order by score desc)
order by t1.subject
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 stuscore
group by stuid,name
order by 总分desc
group by subject
insert into @tmp select null,name,score,stuid from stuscore where subject='数学' order by score desc
declare @id int
set @id=0;
update @tmp set @id=@id+1,pm=@id
select * from @tmp
order by score desc
insert into @tmp
select name,score,stuid from stuscore where subject='数学' order by score desc
select * from @tmp
(
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
insert into @tmp select null,name,score,stuid from stuscore where subject='数学' order by score desc
declare @id int
set @id=0;
update @tmp set @id=@id+1,pm=@id
select * from @tmp where name='李四'
12. 课程 不及格(-59) 良(-80) 优(-100)
(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 优
from stuscore t1 group by subject