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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