擴展Row_Number分頁功能，二分思路。

近期遇到了數據量比較大的多列排序處理，Top Max模式很難滿足多列混合排序的情形，Row_number則可以，但是在末尾的分頁效果已經不太如人意了，想了想二分法改造一下比較適合吧。

本存儲過程適合多列排序，通用，效率不如單純的Top Max二分法，但是要配合多列排序，還是能夠接受。

 

if exists(select name from sysobjects where type='p'and name='DataPager') drop PROCEDURE DataPager go Create PROCEDURE [DataPagerTmp] ( @tblName nvarchar(200), ----要顯示的表或多個表的連接 @fldName nvarchar(1000)='*', ----要顯示的字段列表，一定要包含排序字段 @pageSize int = 10, ----每頁顯示的記錄個數 @page int = 1, ----要顯示那一頁的記錄 @pageCount int = 1 output, ----查詢結果分頁後的總頁數 @Counts int =1 output, ----查詢到的記錄數 @fldSort nvarchar(100)='', ----如果多列排序,最後一列不能帶DESC或ASC,@Sort排序作用於最後一列，反之,單列根據@Sort來處理 @Sort int = 1, ----排序方法，0爲升序，1爲降序 @strCondition nvarchar(1000)='', ----查詢條件,不需where @keyID nvarchar(50) = 'ID' ) /*Create by wszhoho*/ AS declare @sqlTmp nvarchar(2000) declare @sqlGetCount nvarchar(2000) declare @frontOrder nvarchar(200) declare @behindOrder nvarchar(200) declare @start nvarchar(20) declare @end nvarchar(20) begin if @fldSort is null or @fldSort='' set @fldSort=@keyID if charindex(',',@fldSort,0)>0--多列排序,則@Sort排序方法無效 begin if @Sort=1--倒序 set @fldSort = @fldSort + ' Desc' else set @fldSort = @fldSort + ' ASC' set @frontOrder = @fldSort--獲取分頁前半部分數據的排序規則 set @behindOrder = replace(@frontOrder,'desc','desctmp') set @behindOrder = replace(@behindOrder,'asc','desc') set @behindOrder = replace(@behindOrder,'desctmp','asc')--獲取分頁後半部分數據的排序規則 end else--單列 begin set @fldSort=replace(replace(@fldSort,'desc',''),'asc','')--替換掉結尾的規則,用@Sort值來處理排序 if @Sort=1--倒序 begin set @frontOrder = @fldSort + ' desc' set @behindOrder = @fldSort + ' asc' end else begin set @frontOrder = @fldSort + ' asc' set @behindOrder = @fldSort + ' desc' end end --獲取記錄數 if @strCondition is null or @strCondition = ''--無條件 begin set @sqlGetCount = 'select @Counts=count(*) from ' + @tblName end else begin set @sqlGetCount = 'select @Counts=count(*) from ' + @tblName + ' where ' + @strCondition end ----取得查詢結果總數量----- exec sp_executesql @sqlGetCount,N'@Counts int out ',@Counts out declare @tmpCounts int if @Counts = 0 set @tmpCounts = 1 else set @tmpCounts = @Counts --取得分頁總數 set @pageCount=(@tmpCounts+@pageSize-1)/@pageSize /**當前頁大於總頁數 取最後一頁**/ if @page>@pageCount set @page=@pageCount /*-----數據分頁2分處理-------*/ declare @pageIndex int --總數/頁大小 declare @lastcount int --總數%頁大小 最後一頁的數據量 set @pageIndex = @tmpCounts/@pageSize set @lastcount = @tmpCounts%@pageSize if @lastcount > 0 set @pageIndex = @pageIndex + 1 else set @lastcount = @pagesize --取得數據的邏輯分析 if @strCondition is null or @strCondition='' --沒有設置顯示條件 begin if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2 --前半部分數據處理 begin --計算開始結束的行號 set @start = @pageSize*(@page-1)+1 set @end = @start+@pageSize-1 set @sqlTmp='SELECT ' + @fldName + ' FROM (select '+@fldName+',ROW_NUMBER() OVER ( Order by '+@frontOrder+' ) AS RowNumber From '+@tblName+') T WHERE T.RowNumber BETWEEN '+@start+' AND '+@end+' order by '+@frontOrder end else begin set @page = @pageIndex-@page+1 --後半部分數據處理 if @lastcount=@pageSize --如果正好是整數頁 begin set @start = @pageSize*(@page-1)+1 set @end = @start+@pageSize-1 end else begin set @start = @lastcount+@pageSize*(@page-2)+1 set @end = @start+@pageSize-1 end set @sqlTmp='select '+@fldName+' FROM (select '+@fldName+',ROW_NUMBER() OVER ( Order by '+@behindOrder+' ) AS RowNumber From '+@tblName+') T WHERE T.RowNumber BETWEEN '+@start+' AND '+@end+' order by '+@frontOrder end end else --有查詢條件 begin if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2 --前半部分數據處理 begin --計算開始結束的行號 set @start = @pageSize*(@page-1)+1 set @end = @start+@pageSize-1 set @sqlTmp='SELECT ' + @fldName + ' FROM (select '+@fldName+',ROW_NUMBER() OVER ( Order by '+@frontOrder+' ) AS RowNumber From '+@tblName+' where '+@strCondition+') T WHERE T.RowNumber BETWEEN '+@start+' AND '+@end+' order by '+@frontOrder end else begin set @page = @pageIndex-@page+1 --後半部分數據處理 if @lastcount=@pageSize --如果正好是整數頁 begin set @start = @pageSize*(@page-1)+1 set @end = @start+@pageSize-1 end else begin set @start = @lastcount+@pageSize*(@page-2)+1 set @end = @start+@pageSize-1 end set @sqlTmp='select '+@fldName+' FROM (select '+@fldName+',ROW_NUMBER() OVER ( Order by '+@behindOrder+' ) AS RowNumber From '+@tblName+' where '+@strCondition+') T WHERE T.RowNumber BETWEEN '+@start+' AND '+@end+' order by '+@frontOrder end end end exec sp_executesql @sqlTmp --select @sqlTmp

 

相關測試效果依數據量和索引合理性而定。