分页查询sql SQL大数据量分页存储过程效率测试
SQL大数据量分页存储过程效率测试
alter PROCEDURE proc_paged_ part_selectMax
(
@tblName nvarchar( ) 要显示的表或多个表的连接
@fldName nvarchar( ) = * 要显示的字段列表
@pageSize int = 每页显示的记录个数
@page int = 要显示那一页的记录
@fldSort nvarchar( ) = null 排序字段列表或条件
@Sort bit = 排序方法 为升序 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( ) = null 查询条件 不需where
@ID nvarchar( ) 主表的主键
@Dist bit = 是否添加查询字段的 DISTINCT 默认 不添加/ 添加
@pageCount int = output 查询结果分页后的总页数
@Counts int = output 查询到的记录数
)
AS
SET NOCOUNT ON
Declare @sqlTmp nvarchar( ) 存放动态生成的SQL语句
Declare @strTmp nvarchar( ) 存放取得查询结果总数的查询语句
Declare @strID nvarchar( ) 存放取得查询开头或结尾ID的查询语句
Declare @strSortType nvarchar( ) 数据排序规则A
Declare @strFSortType nvarchar( ) 数据排序规则B
Declare @SqlSelect nvarchar( ) 对含有DISTINCT的查询进行SQL构造
Declare @SqlCounts nvarchar( ) 对含有DISTINCT的总数查询进行SQL构造
declare @timediff datetime 耗时测试时间差
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 ( > ) + @strCondition
set @strTmp = @SqlSelect+ @Counts= +@SqlCounts+ FROM +@tblName + where ( > ) + @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 =
set @tmpCounts =

else
set @tmpCounts = @Counts
取得分页总数
set @pageCount=(@tmpCounts+@pageSize )/@pageSize
/**当前页大于总页数 取最后一页**/
if @page>@pageCount
set @page=@pageCount
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 >
set @pageIndex = @pageIndex +
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< or @page<=@pageIndex / + @pageIndex % 前半部分数据处理
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+ 后半部分数据处理
if @page <= 最后一页数据显示
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 有查询条件
begin
if @pageIndex< or @page<=@pageIndex / + @pageIndex % 前半部分数据处理
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+ 后半部分数据处理
if @page <= 最后一页数据显示
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
返回查询结果
exec sp_executesql @strTmp
select datediff(ms @timediff getdate()) as 耗时
print @strTmp
SET NOCOUNT OFF
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