要提高這條語句在頁面中的性能 博主將這個片段寫入了自定義頁面

這樣就能在需要的頁面 區(qū)域調用出來 而不需要時時訪問數據庫

大約10分鐘刷新一次 降低了 大數據下訪客每次訪問時都要查詢多次數據庫的巨大壓力

帝國7的包含自定義頁面可以這么寫

注意：page1.html在根目錄。若在t目錄則寫成"t/page1.html"

或

[includefile]'../../page1.html'[/includefile] 注意：開啟"[includefile]"標簽 后臺--模板--標簽--標簽管理--修改（選擇對應標簽）--開啟

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1、調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]

帝國CMS多表調用最新信息,該演示代碼為默認數據表下全站最新10條圖片信息,自己根據需求可以附加條件,實現全站點擊,全站頭條,全站推薦等等.

注釋：以上多個模型用"Union"連接調用

若只調用圖片：要加ispic=1條件

舉例：

[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、調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]

注釋：以上調用的是（圖片模型：photo、下載模型：download、新聞模型：news）三個模型的文章

三個模型用"Union All"連接調用

若指定欄目用：where classid in(46,47,51)，

若調用推薦在其后追加：and isgood=1，

若指定調用條數在其后追加：limit 10

舉例：

多表調用 同時顯示"標題"所在的"欄目名稱"和"鏈接" 及以"點擊排行"

[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]

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3、多表聯合查詢"主、副"表調用文章

[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]

注釋：以上調用的是（下載模型：download、電影模型：movie）兩個模型，并電影副表中下載地址"downpath"（電影副表下載地址未調出，因為里面沒有東西）

兩個模型用"Union All"連接調用

$olurl=explode('::::::',$fb['downpath']); 真實下載地址的分割