帝国CMS批量提取新闻正文内容的第一张图片作为标题缩略图的SQL语句

执行以下脚本的时候请 先备份数据库！文本存放的新闻正文字段不可用！

新闻正文字段作为主表的情况用以下语句：

update  phome_ecms_news  set  titlepic  =concat(replace(SUBSTRING_INDEX(SUBSTRING_INDEX(newstext,  'src=',  -1),'.gif',1),'"',''),'.gif')  where  newstext  like  '%.gif%'  and  titlepic='';
update  phome_ecms_news  set  titlepic  =concat(replace(SUBSTRING_INDEX(SUBSTRING_INDEX(newstext,  'src=',  -1),'.jpg',1),'"',''),'.gif')  where  newstext  like  '%.jpg%'  and  titlepic='';
update  phome_ecms_news  set  titlepic  =concat(replace(SUBSTRING_INDEX(SUBSTRING_INDEX(newstext,  'src=',  -1),'.png',1),'"',''),'.png')  where  newstext  like  '%.png%'  and  titlepic='';

新闻正文字段作为副表的情况用以下语句：

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