SQL Server 2005高效分页存储过程

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IF exists (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[proc_DataPagingList]') and OBJECTPROPERTY(id,N'IsProcedure') = 1)
drop procedure [dbo].[proc_DataPagingList]
GO

CREATE PROCEDURE [dbo].[proc_DataPagingList]
(
@tableName NVARCHAR(200),----要显示的表或多个表的连接
@fieldNames NVARCHAR(200)='*',----要显示的字段列表
@pageSize INT = 10,----每页显示的记录个数
@page INT = 10,----要显示那一页的记录
@pageCount INT = 1 output,----查询结果分页后的总页数
@counts INT = 1 output,----查询到的总记录数
@fieldSort NVARCHAR(200)= null,----排序字段列表或条件
@sort BIT = 1,----排序方法，0为升序，1为降序--程序传参如：' SortA Asc,SortB Desc,SortC ')
@condition NVARCHAR(200)= null,----查询条件,不需WHERE
@keyID NVARCHAR(100),----主表的主键
@distinct BIT = 0              ----是否添加查询字段的 DISTINCT 默认0不添加/1添加
)
AS

SET NOCOUNT ON
Declare @SELECT NVARCHAR(1000)    ----存放动态生成的SQL语句
Declare @strCounts NVARCHAR(1000) ----存放取得查询结果总数的查询语句
Declare @strID  NVARCHAR(1000)    ----存放取得查询开头或结尾ID的查询语句

Declare @sortTypeA NVARCHAR(10)   ----数据排序规则A
Declare @SortTypeB NVARCHAR(10)   ----数据排序规则B

Declare @distSelect NVARCHAR(50)  ----对含有DISTINCT的查询进行SQL构造
Declare @distCounts NVARCHAR(50)  ----对含有DISTINCT的总数查询进行SQL构造

DECLARE @SortfieldA NVARCHAR(50)  ----对含有是否还有排序字段时的排序方式组合A
DECLARE @SortfieldB NVARCHAR(50)  ----对含有是否还有排序字段时的排序方式组合B


IF @distinct = 0
	BEGIN
		SET @distSelect = 'SELECT '
		SET @distCounts = ' COUNT(*)'
	END
ELSE
	BEGIN
		SET @distSelect = 'SELECT distinct '
		SET @distCounts = ' COUNT(DISTINCT '[email?protected]+')'
	END

IF @sort=0
	BEGIN
		SET @SortTypeB=' ASC '
		SET @sortTypeA=' DESC '
	END
ELSE
	BEGIN
		SET @SortTypeB=' DESC '
		SET @sortTypeA=' ASC '
	END

IF @fieldSort IS NOT NULL AND @fieldSort<>'' --排序字段不为空时
	BEGIN
		SET @SortfieldB=' order by '+ @fieldSort +' '+ @SortTypeB
		SET @SortfieldA=' order by '+ @fieldSort +' '+ @SortTypeA 
	END
ELSE
	BEGIN
		SET @SortfieldB=''
		SET @SortfieldA=''
	END

--------生成查询语句--------
--此处@strCounts为取得查询结果数量的语句
IF @condition is null or @condition=''     --没有设置显示条件
	BEGIN
		SET @SELECT =  @fieldNames + ' FROM ' + @tableName
		SET @strCounts = @distSelect+' @counts='[email?protected]+' FROM '[email?protected]
		SET @strID = ' FROM ' + @tableName
	END
ELSE
	BEGIN
		SET @SELECT = + @fieldNames + 'FROM ' + @tableName + ' WHERE  ' + @condition
		SET @strCounts = @distSelect+' @counts='[email?protected]+' FROM '[email?protected] + ' WHERE ' + @condition
		SET @strID = ' FROM ' + @tableName + ' WHERE  ' + @condition
	END

----取得查询结果总数量-----
exec sp_executesql @strCounts,N'@counts INT out ',@counts out
DECLARE @tmpCounts INT

IF @counts = 0
    SET @tmpCounts = 1
ELSE
    SET @tmpCounts = @counts

    --取得分页总数
    SET @pageCount=(@tmpCount[email?protected])/@pageSize

    --/**当前页大于总页数 取最后一页**/
    IF @page>@pageCount
        SET @[email?protected]

    --/*-----数据分页2分处理-------*/
    DECLARE @pageIndex INT --总数/页大小
    DECLARE @lastcount INT --总数%页大小 

    SET @pageIndex = @tmpCounts/@pageSize
    SET @lastcount = @tmpCounts%@pageSize
    IF @lastcount > 0
        SET @pageIndex = @pageIndex + 1
    ELSE
        SET @lastcount = @pageSize

    --显示分页
    IF @condition is null or @condition=''     --没有设置显示条件
    BEGIN
        IF @pageIndex<2 or @page<[email?protected] / 2 + @pageIndex % 2   --前半部分数据处理
            BEGIN 
                SET @[email?protected]+' TOP '+ CAST(@pageSize as VARCHAR(4))+' '+ @fieldNames+' FROM '[email?protected] + ' WHERE '[email?protected]+' not in('+ @distSelect+' TOP '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @keyID +' FROM '[email?protected] + @SortfieldB +')' + @SortfieldB 
            END
        ELSE
            BEGIN
            SET @page = @[email?protected]+1 --后半部分数据处理
                IF @page <= 1 --最后一页数据显示
                    SET @[email?protected]+' * FROM ('[email?protected]+' TOP '+ CAST(@lastcount as VARCHAR(4))+' '+ @fieldNames+' FROM '[email?protected] + @SortfieldA+') AS TempTB '[email?protected]
                ELSE                
                    SET @[email?protected]+' * FROM ('[email?protected]+' TOP '+ CAST(@pageSize as VARCHAR(4))+' '+ @fieldNames+' FROM '[email?protected] + ' WHERE '[email?protected]+' not in('+ @distSelect+' TOP '+ CAST(@pageSize*(@page-2)[email?protected] as Varchar(20)) +' '+ @keyID +' FROM '[email?protected] + @SortfieldA+')' + @SortfieldA+') AS TempTB '[email?protected]
            END
    END

    ELSE --有查询条件
    BEGIN
        IF @pageIndex<2 or @page<[email?protected] / 2 + @pageIndex % 2   --前半部分数据处理
        BEGIN 
                SET @[email?protected]+' TOP '+ CAST(@pageSize as VARCHAR(4))+' '+ @fieldNames +' FROM  '[email?protected] + ' WHERE '[email?protected]+' not in('+ @distSelect+' TOP '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @keyID +' FROM '[email?protected] + ' Where ' + @condition + @SortfieldB+')'+' AND ' + @condition + @SortfieldB                 
        END
        ELSE
        BEGIN 
            SET @page = @[email?protected]+1 --后半部分数据处理
            IF @page <= 1 --最后一页数据显示
                    SET @[email?protected]+' * FROM ('[email?protected]+' TOP '+ CAST(@lastcount as VARCHAR(4))+' '+ @fieldNames+' FROM '[email?protected] + ' WHERE  '+ @condition [email?protected]+') AS TempTB '[email?protected]
            ELSE
                    SET @[email?protected]+' * FROM ('[email?protected]+' TOP '+ CAST(@pageSize as VARCHAR(4))+' '+ @fieldNames+' FROM '[email?protected] + ' WHERE '[email?protected]+' not in('+ @distSelect+' TOP '+ CAST(@pageSize*(@page-2)[email?protected] as Varchar(20)) +' ' + @keyID +' FROM '[email?protected] +' WHERE  '+ @condition [email?protected]+')' +' AND '+ @condition [email?protected]+') AS TempTB ' + @SortfieldB 
        END    
    END

------返回查询结果-----
exec sp_executesql @strCounts
SET NOCOUNT OFF 

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