WordPress删除重复的自定义字段

将自定义字段修改为您的执行SQL记得先备份数据库

delete from wp_postmetawhere meta_id in ( select * from (select meta_idfrom wp_postmeta awhere a.meta_key = 你的自定义字段and meta_id not in ( select min(meta_id) from wp_postmeta b where b.post_id = a.post_id and b.meta_key = 你的自定义字段) ) as x);