sql选取最值(转来的)

本文转自http://xudayu.blog.51cto.com/187984/86281感谢原作者

1、选取最大的数

select max(id) from tbltest4

 

2、选取最大的三个数

select top 3 * from tbltest4 order by id desc

 

3、选取第2大的数

select top 1 a.* from (select top 2 * from tbltest4 order by id desc) a order by id asc

或者

select * from tbltest4 where id=  
(  
select max(id) from tbltest4 where id not in  
(select max(id) from tbltest4)  
)

 

4、选取第3大的数

select top 1 a.* from (select top 3 * from tbltest4 order by id desc) a order by id asc

 

5、选取最小的数

select min(id) from tbltest4

 

6、选取第2小的数

select top 1 a.* from (select top 2 * from tbltest4 order by id asc) a order by id desc

或

select * from tbltest4 where id=  
(  
select min(id) from tbltest4 where id not in  
(select min(id) from tbltest4)  
)

 

7、选取第3小的数

select top 1 a.* from (select top 3 * from tbltest4 order by id asc) a order by id desc

转载于:https://www.cnblogs.com/tb1over/archive/2011/10/12/2208696.html