数据库查询问题！

[ascap]

表中有一个主键ID，自动增长，但ID有可能是不连续的。我现在要取出表中的第20到第50条记录，请问怎么写这个语句呢？

[SQL77]

SELECT TOP 31 * FROM (SELECT TOP 50 * FROM TB ORDER BY ID DESC) T ORDRE BY ID

[黄_瓜]

取n到m行

1. 
select top m * from tablename where id not in (select top n id from tablename order by id asc/*|desc*/) 

2. 
select top m * into 临时表(或表变量) from tablename order by columnname -- 将top m笔插入到临时表 
set rowcount n   --只取n条结果
select * from 表变量 order by columnname desc 

3. 
select top n * from  
(select top m * from tablename order by columnname) a 
order by columnname desc 


4.如果tablename里没有其他identity列，那么： 
先生成一个序列,存储在一临时表中.
select identity(int) id0,* into #temp from tablename 

取n到m条的语句为： 
select * from #temp where id0 > =n and id0  <= m 

如果你在执行select identity(int) id0,* into #temp from tablename这条语句的时候报错,那是因为你的DB中间的select into/bulkcopy属性没有打开要先执行： 
exec sp_dboption 你的DB名字,'select into/bulkcopy',true 


5.如果表里有identity属性，那么简单： 
select * from tablename where identity_col between n and m  

6.SQL2005开始.可以使用row_number() over()生成行号
;with cte as
(
 select id0=row_number() over(order by id),* from tablename
)
select * from cte where id0 between n to m

[SQL77]

SELECT TOP 31 * FROM (SELECT TOP 50 * FROM TB ORDER BY ID DESC) T ORDER BY ID

[qjcslgnhwayagain]

select top 50 * from table where id not in (select top 10 * from table)

[qjcslgnhwayagain]

错了，应该是
select top 50 * from table where id not in (select top 10 id from table)