1.复制tags字段内容到keyboard，当keyboard为空的时候：
update[!db.pre!]ecms_news_data_1a,[!db.pre!]ecms_newsbsetb.keyboard=a.infotagswherea.id=b.idandb.keyboard='';
2.添加tags字段内容到keyboard：
update[!db.pre!]ecms_news_data_1a,[!db.pre!]ecms_newsbsetb.keyboard=concat(b.keyboard,',',a.infotags)wherea.id=b.idandb.keyboard<>''anda.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_1a,[!db.pre!]ecms_newsbsetb.keyboard=''wherea.id=b.idanda.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_1a,[!db.pre!]ecms_newsbsetb.titlepic=concat(replace(SUBSTRING_INDEX(SUBSTRING_INDEX(a.newstext,'.jpg',1),'src=',-1),'"',''),'.jpg')wherea.newstextlike'%.jpg%'andb.titlepic=''anda.id=b.id;update[!db.pre!]ecms_news_data_1a,[!db.pre!]ecms_newsbsetb.titlepic=concat(replace(SUBSTRING_INDEX(SUBSTRING_INDEX(a.newstext,'.gif',1),'src=',-1),'"',''),'.gif')wherea.newstextlike'%.gif%'andb.titlepic=''anda.id=b.id;