SQL Server实现分页查询的存储过程,效率一般不适合大数据表的分页查询
不说废话,直接上代码
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
/*********************************************************************************
* Copyright (C) 2012 comcretive.net,All Rights Reserved *
* Function: MesnacPaging *
* Description: *
* 通用分页存储过程 *
* Author: *
* 郑立兵(zhlb) *
* Finish DateTime: *
* 2012年9月24日 *
* History: *
* 2012/9/24 Edit By zhlb *
* Example: *
* MesnacPaging @TableName='表名',@Orderfld='排序列名' *
*********************************************************************************/
CREATE PROCEDURE MesnacPaging
(
@TableName nvarchar(50), -- 表名
@ReturnFields nvarchar(2000) = '*', -- 需要返回的列
@PageSize int = 10, -- 每页记录数
@PageIndex int = 1, -- 当前页码
@Where nvarchar(2000) = '', -- 查询条件
@Orderfld nvarchar(2000), -- 排序字段名 最好为唯一主键
@OrderType int = 1 -- 排序类型 1:降序 其它为升序
)
AS
DECLARE @TotalRecord int
DECLARE @TotalPage int
DECLARE @CurrentPageSize int
DECLARE @TotalRecordForPageIndex int
DECLARE @OrderBy nvarchar(255)
DECLARE @CutOrderBy nvarchar(255)
if @OrderType = 1
BEGIN
set @OrderBy = ' Order by ' + REPLACE(@Orderfld,',',' desc,') + ' desc '
set @CutOrderBy = ' Order by '+ REPLACE(@Orderfld,',',' asc,') + ' asc '
END
else
BEGIN
set @OrderBy = ' Order by ' + REPLACE(@Orderfld,',',' asc,') + ' asc '
set @CutOrderBy = ' Order by '+ REPLACE(@Orderfld,',',' desc,') + ' desc '
END
-- 记录总数
declare @countSql nvarchar(4000)
set @countSql='SELECT @TotalRecord=Count(*) From '+@TableName+' '+@Where
execute sp_executesql @countSql,N'@TotalRecord int out',@TotalRecord out
SET @TotalPage=(@TotalRecord-1)/@PageSize+1
SET @CurrentPageSize=@PageSize
IF(@TotalPage=@PageIndex)
BEGIN
SET @CurrentPageSize=@TotalRecord%@PageSize
IF(@CurrentPageSize=0)
SET @CurrentPageSize=@PageSize
END
-- 返回记录
set @TotalRecordForPageIndex=@PageIndex*@PageSize
exec('SELECT * FROM
(SELECT TOP '+@CurrentPageSize+' * FROM
(SELECT TOP '+@TotalRecordForPageIndex+' '+@ReturnFields+'
FROM '+@TableName+' '+@Where+' '+@OrderBy+') TB2
'+@CutOrderBy+') TB3
'+@OrderBy)
-- 返回总页数和总记录数
SELECT @TotalPage as PageCount,@TotalRecord as RecordCount
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
分页思路整理
1、通用(SQL200/SQL2005)排除法not in 、top
--公式
select top pageSize * from 表
where 主键 not in (select top ((currentPageIndex -1) * pageSize) 主键 from 表 order by 字段)
order by 字段
--实例
select top 3 * from books
where id not in(select top 6 id from books order by id)
order by id
2、(SQL2005及更高版本)row_number()分析函数
--公式
select * from
(select *,row_number() over(order by 字段) as rand from 表) as 新表
where rank between (currentPageIndex -1) * pageSize +1 and currentPageIndex * pageSize
order by 字段
--实例
select * from
(select *,row_number() over(order by id) as rank from books) as newtable
where rank between 7 and 9
order by id
3、(主键为数值时)max()
select top 3 * from books
where id > (select max(id) from (select top 6 id from books order by id) as newtable)
order by id