/*存儲過程 分頁處理 孫偉 創建 */
/*存儲過程 分頁處理 浪塵 修改*/
/* 對數據進行了分處理使查詢前半部分數據與查詢後半部分數據性能相同 */
alter PROCEDURE proc_paged_part_selectMax
(
@tblName nvarchar() 要顯示的表或多個表的連接
@fldName nvarchar() = * 要顯示的字段列表
@pageSize int = 每頁顯示的記錄個數
@page int = 要顯示那一頁的記錄
@fldSort nvarchar() = null 排序字段列表或條件
@Sort bit = 排序方法為升序為降序(如果是多字段排列Sort指代最後一個排序字段的排列順序(最後一個排序字段不加排序標記)程序傳參如 SortA AscSortB DescSortC )
@strCondition nvarchar() = null 查詢條件不需where
@ID nvarchar() 主表的主鍵
@Dist bit = 是否添加查詢字段的 DISTINCT 默認不添加/添加
@pageCount int = output 查詢結果分頁後的總頁數
@Counts int = output 查詢到的記錄數
)
AS
SET NOCOUNT ON
Declare @sqlTmp nvarchar() 存放動態生成的SQL語句
Declare @strTmp nvarchar() 存放取得查詢結果總數的查詢語句
Declare @strID nvarchar() 存放取得查詢開頭或結尾ID的查詢語句
Declare @strSortType nvarchar() 數據排序規則A
Declare @strFSortType nvarchar() 數據排序規則B
Declare @SqlSelect nvarchar() 對含有DISTINCT的查詢進行SQL構造
Declare @SqlCounts nvarchar() 對含有DISTINCT的總數查詢進行SQL構造
declare @timediff datetime 耗時測試時間差
select @timediff=getdate()
if @Dist =
begin
set @SqlSelect = select
set @SqlCounts = Count(*)
end
else
begin
set @SqlSelect = select distinct
set @SqlCounts = Count(DISTINCT +@ID+)
end
if @Sort=
begin
set @strFSortType= ASC
set @strSortType= DESC
end
else
begin
set @strFSortType= DESC
set @strSortType= ASC
end
生成查詢語句
此處@strTmp為取得查詢結果數量的語句
if @strCondition is null or @strCondition= 沒有設置顯示條件
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 (>) + @strCondition
set @strTmp = @SqlSelect+ @Counts=+@SqlCounts+ FROM +@tblName + where (>) + @strCondition
set @strID = From + @tblName + where (>) + @strCondition
end
取得查詢結果總數量
exec sp_executesql @strTmpN@Counts int out @Counts out
declare @tmpCounts int
if @Counts =
set @tmpCounts =
else
set @tmpCounts = @Counts
取得分頁總數
set @pageCount=(@tmpCounts+@pageSize)/@pageSize
/**//**//**//**當前頁大於總頁數 取最後一頁**/
if @page>@pageCount
set @page=@pageCount
/*數據分頁分處理*/
declare @pageIndex int 總數/頁大小
declare @lastcount int 總數%頁大小
set @pageIndex = @tmpCounts/@pageSize
set @lastcount = @tmpCounts%@pageSize
if @lastcount >
set @pageIndex = @pageIndex +
else
set @lastcount = @pagesize
//***顯示分頁
if @strCondition is null or @strCondition= 沒有設置顯示條件
begin
if @pageIndex< or @page<=@pageIndex / + @pageIndex % 前半部分數據處理
begin
if @page=
set @strTmp=@SqlSelect+ top + CAST(@pageSize as VARCHAR())+ + @fldName+ from +@tblName
+ order by + @fldSort + + @strFSortType
else
begin
if @Sort=
begin
set @strTmp=@SqlSelect+ top + CAST(@pageSize as VARCHAR())+ + @fldName+ from +@tblName
+ where +@ID+ <(select min(+ @ID +) from (+ @SqlSelect+ top + CAST(@pageSize*(@page) as Varchar()) + + @ID + from +@tblName
+ order by + @fldSort + + @strFSortType+) AS TBMinID)
+ order by + @fldSort + + @strFSortType
end
else
begin
set @strTmp=@SqlSelect+ top + CAST(@pageSize as VARCHAR())+ + @fldName+ from +@tblName
+ where +@ID+ >(select max(+ @ID +) from (+ @SqlSelect+ top + CAST(@pageSize*(@page) as Varchar()) + + @ID + from +@tblName
+ order by + @fldSort + + @strFSortType+) AS TBMinID)
+ order by + @fldSort + + @strFSortType
end
end
end
else
begin
set @page = @pageIndex@page+ 後半部分數據處理
if @page <= 最後一頁數據顯示
set @strTmp=@SqlSelect+ * from (+@SqlSelect+ top + CAST(@lastcount as VARCHAR())+ + @fldName+ from +@tblName
+ order by + @fldSort + + @strSortType+) AS TempTB+ order by + @fldSort + + @strFSortType
else
if @Sort=
begin
set @strTmp=@SqlSelect+ * from (+@SqlSelect+ top + CAST(@pageSize as VARCHAR())+ + @fldName+ from +@tblName
+ where +@ID+ >(select max(+ @ID +) from(+ @SqlSelect+ top + CAST(@pageSize*(@page)+@lastcount as Varchar()) + + @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())+ + @fldName+ from +@tblName
+ where +@ID+ <(select min(+ @ID +) from(+ @SqlSelect+ top + CAST(@pageSize*(@page)+@lastcount as Varchar()) + + @ID + from +@tblName
+ order by + @fldSort + + @strSortType+) AS TBMaxID)
+ order by + @fldSort + + @strSortType+) AS TempTB+ order by + @fldSort + + @strFSortType
end
end
end
else 有查詢條件
begin
if @pageIndex< or @page<=@pageIndex / + @pageIndex % 前半部分數據處理
begin
if @page=
set @strTmp=@SqlSelect+ top + CAST(@pageSize as VARCHAR())+ + @fldName+ from +@tblName
+ where = + @strCondition + order by + @fldSort + + @strFSortType
else if(@Sort=)
begin
set @strTmp=@SqlSelect+ top + CAST(@pageSize as VARCHAR())+ + @fldName+ from +@tblName
+ where +@ID+ <(select min(+ @ID +) from (+ @SqlSelect+ top + CAST(@pageSize*(@page) as Varchar()) + + @ID + from +@tblName
+ where (=) + @strCondition + order by + @fldSort + + @strFSortType+) AS TBMinID)
+ + @strCondition + order by + @fldSort + + @strFSortType
end
else
begin
set @strTmp=@SqlSelect+ top + CAST(@pageSize as VARCHAR())+ + @fldName+ from +@tblName
+ where +@ID+ >(select max(+ @ID +) from (+ @SqlSelect+ top + CAST(@pageSize*(@page) as Varchar()) + + @ID + from +@tblName
+ where (=) + @strCondition + order by + @fldSort + + @strFSortType+) AS TBMinID)
+ + @strCondition + order by + @fldSort + + @strFSortType
end
end
else
begin
set @page = @pageIndex@page+ 後半部分數據處理
if @page <= 最後一頁數據顯示
set @strTmp=@SqlSelect+ * from (+@SqlSelect+ top + CAST(@lastcount as VARCHAR())+ + @fldName+ from +@tblName
+ where (=) + @strCondition + order by + @fldSort + + @strSortType+) AS TempTB+ order by + @fldSort + + @strFSortType
else if(@Sort=)
set @strTmp=@SqlSelect+ * from (+@SqlSelect+ top + CAST(@pageSize as VARCHAR())+ + @fldName+ from +@tblName
+ where +@ID+ >(select max(+ @ID +) from(+ @SqlSelect+ top + CAST(@pageSize*(@page)+@lastcount as Varchar()) + + @ID + from +@tblName
+ where (=) + @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())+ + @fldName+ from +@tblName
+ where +@ID+ <(select min(+ @ID +) from(+ @SqlSelect+ top + CAST(@pageSize*(@page)+@lastcount as Varchar()) + + @ID + from +@tblName
+ where (=) + @strCondition + order by + @fldSort + + @strSortType+) AS TBMaxID)
+ + @strCondition+ order by + @fldSort + + @strSortType+) AS TempTB+ order by + @fldSort + + @strFSortType
end
end
返回查詢結果
exec sp_executesql @strTmp
select datediff(ms@timediffgetdate()) as 耗時
print @strTmp
SET NOCOUNT OFF
GO
From:http://tw.wingwit.com/Article/program/net/201311/11443.html
