把一个班的成绩分为A、B、C三个等级前十名为A，后十名为C，中间为B
求指教~~~
------解决方案--------------------
大致如下：
with temp as
(
select ID, 成绩，名次=ROW_NUMBER()OVER(PARTITION BY 成绩 ORDER BY 成绩 desc)
FROM 表格
)
select ID, 成绩, 等级 = (case when 名次 between 1 and 10 then 'A'
else 'B')
from temp
------解决方案--------------------
--A table
select top 10 * from tb
order by record
--B table
select * from tb
where
id not in(select top 10 id from tb
order by record )
and id not in(
select top 10 id from tb
order by record desc
)
--C table
select top 10 * from tb
order by record desc
------解决方案--------------------
借用了下1L的代码，做了一些补充
- SQL code
with temp as( select ID, 成绩，名次=ROW_NUMBER()OVER(PARTITION BY 成绩 ORDER BY 成绩 desc) FROM 表格)declare @count intselect @count=count(1) from 表格select ID, 成绩, 等级 = (case when 名次 between 1 and 10 then 'A' when 名次 between @count-9 and @count then 'C' else 'B')from temp