高效分页存储过程代码,MSSQL代码库,德仔网

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【MSSQL】高效分页存储过程
作者:Dezai.CN / 发布于2011/8/22/ 926
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set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go

ALTER PROCEDURE [dbo].[proc_ListPage]
(
@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 = 1, ----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, ----查询到的记录数
@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(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
)
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(*)'
end
else
begin
set @SqlSelect = 'select distinct '
set @SqlCounts = 'Count(DISTINCT <a>'+@ID+')'</a>
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 <a>'+@tblName</a>
set @strID = ' From ' + @tblName
end
else
begin
set @sqlTmp = + @fldName + 'From ' + @tblName + ' where ' + @strCondition
set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM <a>'+@tblName</a> + ' where (1>0) ' + @strCondition
set @strID = ' From ' + @tblName + ' where ' + @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<<a href="mailto:=@pageIndex">=@pageIndex</a> / 2 + @pageIndex % 2 --前半部分数据处理
begin 
set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from <a>'+@tblName</a>
+' where <a>'+@ID+'</a> not in('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from <a>'+@tblName</a>
+' order by '+ @fldSort +' '+ @strFSortType+')'
+' order by '+ @fldSort +' '+ @strFSortType 
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 (<a>'+@SqlSelect+'</a> top '+ CAST(@lastcount as VARCHAR(4))+' '+ @fldName+' from <a>'+@tblName</a>
+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType 
else 
set @strTmp=@SqlSelect+' * from (<a>'+@SqlSelect+'</a> top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from <a>'+@tblName</a>
+' where <a>'+@ID+'</a> not in('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from <a>'+@tblName</a>
+' order by '+ @fldSort +' '+ @strSortType+')'
+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType 
end
end
else --有查询条件
begin
if @pageIndex<2 or @page<<a href="mailto:=@pageIndex">=@pageIndex</a> / 2 + @pageIndex % 2 --前半部分数据处理
begin 
set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName +' from <a>'+@tblName</a>
+' where <a>'+@ID+'</a> not in('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from <a>'+@tblName</a>
+' Where (1>0) ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType+')'
+' ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType 
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 (<a>'+@SqlSelect+'</a> top '+ CAST(@lastcount as VARCHAR(4))+' '+ @fldName+' from <a>'+@tblName</a>
+' where (1>0) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
else
set @strTmp=@SqlSelect+' * from (<a>'+@SqlSelect+'</a> top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from <a>'+@tblName</a>
+' where <a>'+@ID+'</a> not in('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from <a>'+@tblName</a>
+' where (1>0) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+')'
+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType 
end 
end
------返回查询结果-----
exec sp_executesql @strTmp
print @strTmp
SET NOCOUNT OFF

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