ROW_NUMBER() 分页

听说用ROW_NUMBER()分页100W条数据翻页只要2-3秒,有时间测试下

-- NORTHWND.MDF库
DECLARE   @pagenum   AS   INT ,  @pagesize   AS   INT
SET   @pagenum   =   2
SET   @pagesize   =   3
SELECT   *
FROM  ( SELECT  ROW_NUMBER()  OVER ( ORDER   BY  EmployeeID  DESC )  AS  RowNum, 
         *
       FROM  Employees)  AS  Employees
WHERE  RowNum  BETWEEN  ( @pagenum - 1 ) * @pagesize + 1   AND   @pagenum * @pagesize
ORDER   BY  EmployeeID  DESC

---

2009年7月3日 23:30:20 测试

CREATE   procedure   [ dbo ] . [ p_test ]  
@startIndex   int ,
@endIndex   int ,
@docount   bit ,
@strwhere   varchar ( 20 )
as

if ( @docount = 1 )
select   count (id)  from  tb_testtable
else

begin
  SET   @strwhere   =   CHAR ( 34 )  +   CHAR ( 42 )  +   @strwhere   +   CHAR ( 42 )  +   CHAR ( 34 );
  with  temptbl  as  ( SELECT  ROW_NUMBER()  OVER  ( ORDER   BY  id  desc ) AS  Row,  *   from  tb_testtable  where   CONTAINS ( * ,  @strwhere ))
  SELECT   *   FROM  temptbl  where  Row  between   @startIndex   and   @endIndex
end

---

全文索引（模糊搜索）测试，共五百万条数据，耗时436毫秒。

begin  
set  nocount  on ; 
declare   @timediff   datetime  
select   @timediff = Getdate () 

select   count (id)  as  总行数  from  tb_testtable
exec  P_test  @startIndex = 1 , @endIndex = 20 , @docount = 0 , @strwhere = ' 爱情 '

select   datediff (ms, @timediff , GetDate ())  as  耗时 
set  nocount  off ; 
end

/*

总行数         
----------- 
5000001

id          userName             userText                      
----------- -------------------- -----------------------------
5080        admin                人们争执不休的爱情道理只是些没

耗时          
----------- 
446

*/