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SQL SERVER 2008 查询语句的有关问题。

发布时间: 2013-12-07 22:19:20 作者: rapoo

SQL SERVER 2008 查询语句的问题。。在线等吖亲!!
用TOP 可以得到前N行或者后N行
问题就是。。怎么~或者~要用什么能得到特定的行数~~
例如 5—10行。之类的。。

在线求解答吖。。我还是新手→→~刚接触这个。。
[解决办法]
类似这样就行,通过row_number函数:

select *
from
(
select *,
ROW_NUMBER() over(order by getdate()) as rownum
from tb
)t
where rownum between 5 and 10

[解决办法]

select top 5 * from (select top 10 * from tb) a order by id desc

[解决办法]
取n到m行

1.
select top (n-m+1) * from tablename where id not in (select top n id from tablename order by id asc/*
[解决办法]
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

[解决办法]
笔试题中最常用的是先查topn,再反过来取top m实现n~m的数据

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