分页存储过程（二分处理）

-- =============================================
-- Author:        <jason,cheng>
-- Create date: <2012-9-24>
-- Description:    <通用存储过程分页[二分处理]>
-- ExcuteDemo:exec UP_paged_2part_selectMax 'tb_testTable','ID,userName,userPWD,userEmail',10,100000,'ID',0,null,'ID',0
-- =============================================
ALTER PROCEDURE [dbo].[UP_paged_2part_selectMax] 
( 
 @tblName     nvarchar(max),        --要显示的表或多个表的连接 
 @fldName     nvarchar(max) = '*',  --要显示的字段列表 
 @pageSize    int = 10,             --每页显示的记录个数 (不能>1000)
 @page        int = 1,              --要显示那一页的记录 
 @fldSort    nvarchar(200) = null,  --排序字段列表或条件 
 @Sort        bit = 0,              --排序方法，0为升序，1为降序(如果是多字段排列Sort指代最后一个排序字段的排列顺序(最后一个排序字段不加排序标记)--程序传参如：' SortA Asc,SortB Desc,SortC ') 
 @strCondition nvarchar(max)= null, --查询条件,不需where ep: AND id = 1
 @ID        nvarchar(150),          --主表的主键 
 @Dist                 bit = 0,     --是否添加查询字段的 DISTINCT 默认0不添加/1添加 
 @pageCount    int = 1 output,      --查询结果分页后的总页数 
 @Counts    int = 1 output          --查询到的记录数 
 ) 
 AS 
 SET NOCOUNT ON 
 Declare @sqlTmp nvarchar(max)        --存放动态生成的SQL语句 
 Declare @strTmp nvarchar(max)        --存放取得查询结果总数的查询语句 
 Declare @strID     nvarchar(max)    --存放取得查询开头或结尾ID的查询语句 
 Declare @strSortType nvarchar(10)    --数据排序规则A 
 Declare @strFSortType nvarchar(10)   --数据排序规则B 
 Declare @SqlSelect nvarchar(max)      --对含有DISTINCT的查询进行SQL构造 
 Declare @SqlCounts nvarchar(max)      --对含有DISTINCT的总数查询进行SQL构造 
 declare @timediff datetime              --耗时测试时间差 
 select @timediff=getdate() 
 if @Dist  = 0 
 begin 
    set @SqlSelect = 'select ' 
    set @SqlCounts = 'Count(*)' 
 end 
 else 
 begin 
    set @SqlSelect = 'select distinct ' 
    set @SqlCounts = 'Count(DISTINCT '+@ID+')' 
 end 
 if @Sort=0 
 begin 
    set @strFSortType=' ASC ' 
    set @strSortType=' DESC ' 
 end 
 else 
 begin 
     set @strFSortType=' DESC ' 
     set @strSortType=' ASC ' 
 end 
 --------生成查询语句-------- 
 --此处@strTmp为取得查询结果数量的语句 
 if @strCondition is null or @strCondition=''     --没有设置显示条件 
 begin 
     set @sqlTmp =  @fldName + ' From ' + @tblName 
     set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName 
     set @strID = ' From ' + @tblName 
 end 
 else 
 begin 
     set @sqlTmp = + @fldName + 'From ' + @tblName + ' where (1>0) ' + @strCondition 
     set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName + ' where (1>0) ' + @strCondition 
     set @strID = ' From ' + @tblName + ' where (1>0) ' + @strCondition 
 end 
 ----取得查询结果总数量----- 
 exec sp_executesql @strTmp,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=(@tmpCounts+@pageSize-1)/@pageSize 
     /**//**当前页大于总页数 取最后一页**/ 
     if @page>@pageCount 
         set @page=@pageCount 
     --/*-----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 @strCondition is null or @strCondition=''     --没有设置显示条件 
    begin 
        if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理 
            begin  
                if @page=1 
                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName                         
                        +' order by '+ @fldSort +' '+ @strFSortType 
                else 
                begin 
                    if @Sort=1 
                    begin                     
                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' <(select min('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)' 
                        +' order by '+ @fldSort +' '+ @strFSortType 
                    end 
                    else 
                    begin 
                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' >(select max('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)' 
                        +' order by '+ @fldSort +' '+ @strFSortType  
                    end 
                end     
            end 
        else 
            begin 
            set @page = @pageIndex-@page+1 --后半部分数据处理 
                if @page <= 1 --最后一页数据显示                 
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType  
                else 
                    if @Sort=1 
                    begin 
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' >(select max('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)' 
                        +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType 
                    end 
                    else 
                    begin 
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' <(select min('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)' 
                        +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType  
                    end 
            end 
    end 
    else --有查询条件 
    begin 
        if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理 
        begin 
                if @page=1 
                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName                         
                        +' where 1=1 ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType 
                else if(@Sort=1) 
                begin                     
                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' <(select min('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' where (1=1) ' + @strCondition +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)' 
                        +' '+ @strCondition +' order by '+ @fldSort +' '+ @strFSortType 
                end 
                else 
                begin 
                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' >(select max('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' where (1=1) ' + @strCondition +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)' 
                        +' '+ @strCondition +' order by '+ @fldSort +' '+ @strFSortType  
                end            
        end 
        else 
        begin  
            set @page = @pageIndex-@page+1 --后半部分数据处理 
            if @page <= 1 --最后一页数据显示 
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType                      
            else if(@Sort=1) 
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' >(select max('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)' 
                        +' '+ @strCondition+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType     
            else 
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' <(select min('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)' 
                        +' '+ @strCondition+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType             
        end     
    end 

------返回查询结果----- 
exec sp_executesql @strTmp 
select datediff(ms,@timediff,getdate()) as 耗时, @pageCount as 总页数, @Counts as 记录数;
--select  @strTmp as sql语句;
SET NOCOUNT OFF