要提高这条语句在页面中的性能 博主将这个片段写入了自定义页面
这样就能在需要的页面 区域调用出来 而不需要时时访问数据库
大约10分钟刷新一次 降低了 大数据下访客每次访问时都要查询多次数据库的巨大压力
帝国7的包含自定义页面可以这么写
注意：page1.html在根目录。若在t目录则写成"t/page1.html"
或
[includefile]'../../page1.html'[/includefile] 注意：开启"[includefile]"标签 后台--模板--标签--标签管理--修改（选择对应标签）--开启
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1、调用多模型的最新文章
[e:loop={'select * from (
select id,classid,titleurl,filename,title,newstime,titlepic from [!db.pre!]ecms_movie where newstime union
select id,classid,titleurl,filename,title,newstime,titlepic from [!db.pre!]ecms_news where newstime union
select id,classid,titleurl,filename,title,newstime,titlepic from [!db.pre!]ecms_photo where newstime union
select id,classid,titleurl,filename,title,newstime,titlepic from [!db.pre!]ecms_flash where newstime union
select id,classid,titleurl,filename,title,newstime,titlepic from [!db.pre!]ecms_article where newstime
) a order by newstime desc limit 10',10,24,1}]
[/e:loop]
帝国CMS多表调用最新信息,该演示代码为默认数据表下全站最新10条图片信息,自己根据需求可以附加条件,实现全站点击,全站头条,全站推荐等等.
注释：以上多个模型用"Union"连接调用
若只调用图片：要加ispic=1条件
举例：
[e:loop={'select * from (
select id,classid,titleurl,filename,title,newstime,titlepic from [!db.pre!]ecms_news where newstime and ispic=1 union
select id,classid,titleurl,filename,title,newstime,titlepic from [!db.pre!]ecms_photo where newstime and ispic=1 union
select id,classid,titleurl,filename,title,newstime,titlepic from [!db.pre!]ecms_flash where newstime and ispic=1 union
select id,classid,titleurl,filename,title,newstime,titlepic from [!db.pre!]ecms_article where newstime and ispic=1) a order by newstime desc limit 10',10,24,1}]
[/e:loop]
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2、调用多模型的最新文章
[e:loop={'select title,titleurl,titlepic from [!db.pre!]ecms_photo Union All select title,titleurl,titlepic from [!db.pre!]ecms_download Union All
select title,titleurl,titlepic from [!db.pre!]ecms_news',0,24,0}]
[/e:loop]
注释：以上调用的是（图片模型：photo、下载模型：download、新闻模型：news）三个模型的文章
三个模型用"Union All"连接调用
若指定栏目用：where classid in(46,47,51)，
若调用推荐在其后追加：and isgood=1，
若指定调用条数在其后追加：limit 10
举例：
多表调用 同时显示"标题"所在的"栏目名称"和"链接" 及以"点击排行"
[e:loop={"select titleurl,title,onclick,classid from phome_ecms_news union all select titleurl,title,onclick,classid from phome_ecms_article order by onclick desc limit 10",1,24,0}]
[/e:loop]
---------------------------------------------------------------------------------
3、多表联合查询"主、副"表调用文章
[e:loop={'select * from (
(select id,classid,title,titleurl,titlepic,newstime from [!db.pre!]ecms_download limit 3 )
Union All
(select id,classid,title,titleurl,titlepic,newstime from [!db.pre!]ecms_movie limit 3)
) as A order by newstime desc ',0,24,0}]
$fb=$empire->fetch1("select *
from
(
(select id,classid,downpath from {$dbtbpre}ecms_download_data_1 where id='$bqr[id]' and classid='$bqr[classid]')
Union All
(select id,classid,downpath from {$dbtbpre}ecms_movie_data_1 where id='$bqr[id]' and classid='$bqr[classid]')
) as A");
$olurl=explode('::::::',$fb['downpath']);
?>
[/e:loop]
注释：以上调用的是（下载模型：download、电影模型：movie）两个模型，并电影副表中下载地址"downpath"（电影副表下载地址未调出，因为里面没有东西）
两个模型用"Union All"连接调用
$olurl=explode('::::::',$fb['downpath']); 真实下载地址的分割
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