急！求优化分页存储过程
该存储过程该如何优化，才能保证查询1000000条数据能在10秒完成。（此存储过程是个通用的分页存储过程）
ALTER procedure [dbo].[usp_fPage]
(
@tblName nvarchar(4000), ----要显示的表或多个表的连接
@fldName nvarchar(4000) = '*', ----要显示的字段列表
@pageSize int = 10,----每页显示的记录个数
@page int = 1,----当前页码
@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(4000), ----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(4000) , ----查询条件,不需where
@ID nvarchar(4000), ----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 --设置不返回计数
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
--判断列是否传入
if @fldName is null or @fldName=''
begin
set @fldName='*'
end
if @Dist = 0
begin
set @SqlSelect = 'Select '
set @SqlCounts = 'Count(*)'
end
else
begin
set @SqlSelect = 'Select Distinct '
set @SqlCounts = 'Count(DISTINCT '+@ID+')'
end
--排序列(如果没有传入排序列，默认按主键排序）
if @fldSort is null or @fldSort=''
begin
set @fldSort=@ID
end
--排序方式
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 = @SqlSelect+ @fldName + ' FROM ' + @tblName
set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName
set @strID = ' FROM ' + @tblName
end
else
begin
set @sqlTmp = @SqlSelect+ @fldName + ' FROM ' + @tblName + ' where 1=1 ' + @strCondition
set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName + ' where 1=1 ' + @strCondition
set @strID = ' FROM ' + @tblName + ' where 1=1 ' + @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 --首页
set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as NVARCHAR(100))+' '+ @fldName+' FROM '+@tblName
+' order by '+ @fldSort +' '+ @strFSortType
else
begin
set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as NVARCHAR(100))+' '+ @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
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 NVARCHAR(100))+' '+ @fldName+' FROM '+@tblName
+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
else
set @strTmp=@SqlSelect+' * FROM ('+@SqlSelect+' top '+ CAST(@pageSize as NVARCHAR(100))+' '+ @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
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--首页
set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as NVARCHAR(100))+' '+ @fldName+' FROM '+@tblName
+' where 1=1 ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType
else
begin
set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as NVARCHAR(100))+' '+ @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
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 NVARCHAR(100))+' '+ @fldName+' FROM '+@tblName
+' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
else
set @strTmp=@SqlSelect+' * FROM ('+@SqlSelect+' top '+ CAST(@pageSize as NVARCHAR(100))+' '+ @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
end
end
------返回查询结果-----
exec sp_executesql @strTmp
SET NOCOUNT OFF --设置返回计数
存储 性能优化 分页
[解决办法]
