帝国cms常用的SQL语句

来源:黎青松SEO博客 时间:2020-11-02

1.复制tags字段内容到keyboard,当keyboard为空的时候:

update [!db.pre!]ecms_news_data_1 a, [!db.pre!]ecms_news b set b.keyboard=a.infotags where a.id=b.id and b.keyboard='';

2.添加tags字段内容到keyboard:

update [!db.pre!]ecms_news_data_1 a, [!db.pre!]ecms_news b set b.keyboard=concat(b.keyboard,',',a.infotags) where a.id=b.id and b.keyboard<>'' and a.infotags<>'';

3.如果副表中keyid(相关链接)字段为空,说明keyboard设置不合理,干脆清空,为自动分词扫清障碍

update [!db.pre!]ecms_news_data_1 a, [!db.pre!]ecms_news b set b.keyboard='' where a.id=b.id and a.keyid=''

4.newstext在副表,提取第一张图片为标题图片。当标题图片为空的时候。

update [!db.pre!]ecms_news_data_1 a, [!db.pre!]ecms_news b set b.titlepic=concat(replace(SUBSTRING_INDEX(SUBSTRING_INDEX(a.newstext, '.jpg', 1),'src=',-1),'"',''),'.jpg') where a.newstext like '%.jpg%' and b.titlepic='' and a.id=b.id;

update [!db.pre!]ecms_news_data_1 a, [!db.pre!]ecms_news b set b.titlepic=concat(replace(SUBSTRING_INDEX(SUBSTRING_INDEX(a.newstext, '.gif', 1),'src=',-1),'"',''),'.gif') where a.newstext like '%.gif%' and b.titlepic='' and a.id=b.id;

文章转自:黎青松SEO博客

来源地址:http://www.alitaohuo.com/CMSjiaocheng/diguojiaocheng/1685.html

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