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