查询数据时，怎么筛选的要查多少条?

n - m條記錄
1 .
select top m * into 临时表(或表变量) from tablename order by columnname -- 将top m笔插入
set rowcount n
select * from 表变量 order by columnname desc


2 .
select top n * from
( select top m * from tablename order by columnname) a
order by columnname desc


3 .
如果tablename里没有其他identity列，那么：
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


4 .
如果表里有identity属性，那么简单：
select * from tablename where identitycol between n and m