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分页sql

Posted on 2009-07-15 12:13  linFen  阅读(298)  评论(0编辑  收藏  举报
/*********************************************************
* 使用说明:
    1、单表调用方法:EXEC usp_DataPaging @tblName = 'ipa',@fldName = '*',@pageSize =50,@page = 6789,@fldSort = '',@Sort = 1,@strCondition = '',@ID = 'id',@Dist = 0,@pageCount = null,@Counts = NULL
    2、多表调用方法:EXEC  usp_DataPaging @tblName = 'Info LEFT JOIN InfoType it ON it.typeid=Info.tid',@fldName = 'info.*,it.tname',@pageSize =50,@page = 1806,@fldSort = '',@Sort = 0,@strCondition = '',@ID = 'id',@Dist = 0,    @pageCount = null,@Counts = NULL   
* 多表联合查询使用需注意:1、多表中的主键字段不能为相同的名称。2、多表中不能允许具有相同名称的字段,如果存在相同名称的字段你可以使用AS重命名
*********************************************************/ 
 create PROCEDURE [dbo].[usp_DataPaging] 
 ( 
 @tblName     nvarchar(200),        ----要显示的表或多个表的连接 
 @fldName     nvarchar(500) = '*',    ----要显示的字段列表 
 @pageSize    int = 10,        ----每页显示的记录个数 
 @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,1为升序,0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(1000) = null,    ----查询条件,不需where 
 @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(1000)        ----存放动态生成的SQL语句 
 Declare @strTmp 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 @strSortType nvarchar(10)    ----数据排序规则A 
 Declare @strFSortType nvarchar(10)    ----数据排序规则B 
  
 Declare @SqlSelect nvarchar(50)         ----对含有DISTINCT的查询进行SQL构造 
 Declare @SqlCounts nvarchar(50)          ----对含有DISTINCT的总数查询进行SQL构造 
  
  
 if @Dist  = 0 
 begin 
     set @SqlSelect = 'select ' 
     set @SqlCounts = 'Count(0)' 
 end 
 else 
 begin 
     set @SqlSelect = 'select distinct ' 
     set @SqlCounts = 'Count(DISTINCT '+@ID+')' 
 end 
  
  
 if @Sort=0 
 begin 
     set @strFSortType=' DESC ' 
     set @strSortType=' DESC ' 
 end 
 else 
 begin 
     set @strFSortType=' ASC ' 
     set @strSortType=' ASC ' 
 end 
  
if(@fldSort is not null and @fldSort<>'')
begin
    set @fldSort=','+@fldSort
end
else
begin
    set @fldSort=' '
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 
 
 --为配合显示 
 --set nocount off 
 --select @page curpage,@pageSize pagesize,@pageCount countpage,@tmpCounts [Rowcount] 
 --set nocount on 
 
  --//***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(40))+' '+ @fldName+' from '+@tblName                         
                         +' order by '+ @ID+' '+ @strFSortType+@fldSort
                 else 
                 begin                     
                     set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName 
                         +' where '+@ID 
                     if @Sort=0 
                        set @strTmp = @strTmp + '>(select max(' 
                     else 
                        set @strTmp = @strTmp + '<(select min(' 
                     set @strTmp = @strTmp + @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
                         +' order by '+ @ID+' '+ @strFSortType+@fldSort+') AS TBMinID)' 
                         +' order by '+ @ID+' '+ @strFSortType+@fldSort
                 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(40))+' '+ @fldName+' from '+@tblName 
                         +' order by '+ @ID +' '+ @strSortType+@fldSort+') AS TempTB'+' order by '+ @ID+' '+ @strFSortType+@fldSort
                 else 
                     begin 
                     set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName 
                         +' where '+@ID 
                         if @Sort=0 
                            set @strTmp=@strTmp+' <(select min(' 
                         else 
                            set @strTmp=@strTmp+' >(select max(' 
  set @strTmp=@strTmp+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
                         +' order by '+ @ID +' '+ @strSortType+@fldSort+') AS TBMaxID)' 
                         +' order by '+ @ID +' '+ @strSortType+@fldSort+') AS TempTB'+' order by '+ @ID+' '+ @strFSortType+@fldSort
                    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(40))+' '+ @fldName+' from '+@tblName                         
                         +' where 1=1 ' + @strCondition + ' order by '+ @ID+' '+ @strFSortType+@fldSort
                 else 
                 begin                     
                     set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName 
                         +' where '+@ID 
                     if @Sort=0 
                        set @strTmp = @strTmp + '>(select max(' 
                     else 
                        set @strTmp = @strTmp + '<(select min(' 
  
                  set @strTmp = @strTmp + @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
                         +' where (1=1) ' + @strCondition +' order by '+ @ID+' '+ @strFSortType+@fldSort+') AS TBMinID)' 
                         +' '+ @strCondition +' order by '+ @ID+' '+ @strFSortType+@fldSort
                 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(40))+' '+ @fldName+' from '+@tblName 
                         +' where (1=1) '+ @strCondition +' order by '+ @ID +' '+ @strSortType+@fldSort+') AS TempTB'+' order by '+ @ID+' '+ @strFSortType+@fldSort                    
             else 
                   begin 
                     set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName 
                         +' where '+@ID 
                     if @Sort=0 
                        set @strTmp = @strTmp + '<(select min(' 
                     else 
                        set @strTmp = @strTmp + '>(select max(' 
                set @strTmp = @strTmp + @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
                         +' where (1=1) '+ @strCondition +' order by '+ @ID +' '+ @strSortType+@fldSort+') AS TBMaxID)' 
                         +' '+ @strCondition+' order by '+ @ID +' '+ @strSortType+@fldSort+') AS TempTB'+' order by '+ @ID+' '+ @strFSortType+@fldSort 
                  end               
         end     
    
     end 
  
 ------返回查询结果----- 
SET NOCOUNT off 
 exec sp_executesql @strTmp 
print @strTmp