SQL Server三种高效率分页方法

1.如果有一个自动增长的id字段，则：

  定义二个变量：Page,PageCount

  Select top PageCount * From [tb_code] Where id>=(select min(id) from (select top (Page-1)*PageCount+1 id from [tb_code] order by id desc) as t) order by id desc

  原理，根据ID计算出(Page-1)页的最小值，然后用TOP关键字及可解决问题。

2.SELECT TOP 10 id,username From [tb_code] where id not in

( SELECT TOP 20000 id FROM tb_code ORDER BY username)

  优点：此方法可以根据表中的任一个字段排序，在一个表中有几百万条记录时，仍有很高的效率，缺点是在大数据量的情况下效率略逊于第一种

3.SELECT TOP 10 id,username From 

(SELECT TOP page*pagecount id, username FROM tb_code ORDER BY username) 

DERIVEDTBL ORDER BY username DESC

  优点：此方法可以根据表中的任一个字段排序.

  缺点是效率最低

使用row_number分页

declare @startRowIndex int;
declare @endRowIndex int;
declare @maximumRows int;
set @startRowIndex=2;
set @endRowIndex=2;
set @maximumRows=2;
SELECT * from (SELECT id,row_number() over(order by id) as rownum
  FROM [tb].[dbo].[b] ) as t
  where t.rownum>@startRowIndex and t.rownum<[email protected][email protected]