Home Backend Development PHP Tutorial 「相关文章」结果是越相关排名越前的案例,高效的写法

「相关文章」结果是越相关排名越前的案例,高效的写法

Jun 13, 2016 pm 12:05 PM
content nbsp select tag

「相关文章」结果是越相关排名越前的案例,求一个高效的写法

本帖最后由 sky94132003 于 2014-08-24 03:53:35 编辑 我的文章系统,想按照多个件条下
,看看有什么可能性可做到

4张表  基础简介
content 文章主表
id
lid = 相关的文集id ,保存格式 (1,2,3)
tags = 相关的TAG 的ID   ,保存格式 (1,2,3)
typeid = 分类ID 只为1个数字 
文集
lid
name

Tags
id
name
分类
typeid
name

typeid = 分类ID, 不别多说
tag = 标签这不用多说,
lid = 一个文集, 但一篇文章可以放到多个文集, 比如: PHP+MYSQL+AJAX无刷新评论
用户可能放到  PHP文集,MYSQL文章,AJAX文集

TAG 是全站共用,重复就不新增,只会选择  
所以不能做成一个自己文章的分类列表,所以会出现了文集功能


因为文章某个部分已经会显示当前文集其他的文章

所以在关相文章的部分,文集中的文件不比TAG文章更应该排在前面

所以准备的关系排名是
1. TAG相关
2. 文集
3. 最新的当前分类文章

为什么要分3次???

因为我就是怕太TAG,同时又没有用到文集功能....
所以最后一步才是当前分类文章



当前文章的
TAG 是3,14
lid = 7,12
typeid = 2

SELECT * FROM `content` WHERE `tags` IN (3,14) ORDER BY `time` DESC LIMIT 10
SELECT * FROM `content` WHERE `lid` IN (7,12) ORDER BY `time` DESC LIMIT 10
SELECT * FROM `content` WHERE `typeid` = '2' ORDER BY `time` DESC LIMIT 10


前台显示十条相关文章
本来是准备,分3次,然后每次拿10条是最安全的

后来想想...这样还有合并数组什么的也麻烦,重点是取太多资料,但前台只需要10条

所以换成一句
SELECT * FROM `video_content` WHERE `tags` IN (3,14) or `lid` IN (3) or `typeid` = 2  LIMIT 10

但这样好像又能以TAG>文集>分类...去排名

请求一下有何方法?

要求好像蛮麻烦的呵呵,因为页面下半部有50%的部分是显示相关文章,所以在营运上很重要
------解决方案--------------------
sql用or、not in本来就不好;
如果数据不需要太及时的话
把你3条sql语句组合好的数据缓存一段时间(半小时、一小时、甚至再长一点也可以)
因为你的数据都是死数据,没有浏览量,评论量等等
------解决方案--------------------
你的 意思是不是如果要10条tag,就先取10条tag,不够再取有lib,接着不够再取有type的?

如果是这样的话, 你的sql是不是会有问题!
------解决方案--------------------
用全文检索来做
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