1.復制tags字段內(nèi)容到keyboard，當keyboard為空的時候：
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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=''; copyright limeiseo
2.添加tags字段內(nèi)容到keyboard：
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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'';
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3.如果副表中keyid（相關(guān)鏈接）字段為空，說明keyboard設(shè)置不合理，干脆清空，為自動分詞掃清障礙
update [!db.pre!]ecms_news_data_1 a, [!db.pre!]ecms_news b set b.keyboard='' where a.id=b.id and a.keyid=''
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4.newstext在副表，提取第一張圖片為標題圖片。當標題圖片為空的時候。
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; 利美知識百科
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; limeiseo（加v分享）
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