效率问题
论坛是用树型结构是不是比每次点击进去看的效率高，
如果是，如何实现的，我想的好复杂
另外，分页程序你们是不是每次吧数据都读出来的，如何做效率高，使每次看的时候才读出当前页的记录，
谢谢
问题点数：30、回复次数：3Top
1 楼tripofdream（梦之旅）回复于 2001-07-25 13:28:05 得分 0
>>另外，分页程序你们是不是每次吧数据都读出来的，如何做效率高，使每次看的时候才读出当前页的记录，
那就做分页的存储过程好了
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2 楼lasttenth（开水）回复于 2001-07-26 00:07:36 得分 0
我看存储过程就头大
给个例子吧Top
3 楼tripofdream（梦之旅）回复于 2001-07-26 21:44:08 得分 30
转自chinaasp
存储过程分页
关键词：Sql Server, ASP
作者：bigeagle
if exists(select * from sysobjects where ID = object_id("up_TopicList"))
drop proc up_TopicList
go
create proc up_TopicList
@a_ForumID int , @a_intDays int , @a_intPageNo int , @a_intPageSize tinyint
as
declare @m_intRecordNumber int
declare @m_intStartRecord int
select @m_intRecordNumber = @a_intPageSize * @a_intPageNo
select @m_intStartRecord = @a_intPageSize * (@a_intPageNo - 1) + 1
if @a_intDays = 0 --如果不限定天数
begin
/*求符合条件记录数*/
select "RecordCount" = count(*)
from BBS where Layer=1 and ForumID = @a_ForumID
/*输出纪录*/
/*首先定义可滚动光标*/
set rowcount @m_intRecordNumber
declare m_curTemp Scroll cursor
for
select a.ID ,a.Title , d.UserName , a.FaceID ,
'ContentSize' = datalength(a.Content) ,
'TotalChilds' = (select sum(TotalChilds)
from BBS as b
where a.RootID = b.RootID) ,
'LastReplyTime' = (select max(PostTime)
from BBS as c
where a.RootID = c.RootID)
from BBS as a
join BBSUser as d on a.UserID = d.ID
where Layer=1 and ForumID = @a_ForumID
order by RootID desc , Layer , PostTime
open m_curTemp
fetch absolute @m_intStartRecord from m_curTemp
while @@fetch_status = 0
fetch next from m_curTemp
set rowcount 0
/*清场*/
CLOSE m_curTemp
DEALLOCATE m_curTemp
end
else --如果限定天数
begin
/*求符合条件记录数*/
select "RecordCount" = count(*)
from BBS where Layer=1 and ForumID = @a_ForumID
and dateadd(day , @a_intDays , PostTime) > getdate()
/*输出纪录*/
/*首先定义可滚动光标*/
set rowcount @m_intRecordNumber
declare m_curTemp Scroll cursor
for
select a.ID ,a.Title , d.UserName , a.FaceID ,
'ContentSize' = datalength(a.Content) ,
'TotalChilds' = (select sum(TotalChilds)
from BBS as b
where a.RootID = b.RootID) ,
'LastReplyTime' = (select max(PostTime)
from BBS as c
where a.RootID = c.RootID)
from BBS as a
join BBSUser as d on a.UserID = d.ID
where Layer=1 and ForumID = @a_ForumID
and dateadd(day , @a_intDays , PostTime) > getdate()
order by RootID desc , Layer , PostTime
open m_curTemp
fetch absolute @m_intStartRecord from m_curTemp
while @@fetch_status = 0
fetch next from m_curTemp
set rowcount 0
/*清场*/
CLOSE m_curTemp
DEALLOCATE m_curTemp
end
go
注：若在asp中调用存储过程的command对象为cm，则set rs=cm.execute，然后用set rs=rs.nextrecordset取下一条记录。
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