select supplimental_id, url, path 
  from c4_contest_enroll_supplemental ces 
  left join c4_docscnv d on ces.supplimental_id=d.doc_id 
  where path is null and url REGEXP '\.ppt$|\.pptx$|\.docx$|\.doc$';

[ 编辑 | 历史 ]
最近由“jilili”在“2017-05-19 04:07:01”修改