摘要: LEFT JOIN (select patent_no,legal_flag from t_legal_status as b where not exists(select 1 from t_legal_status where patent_no= b.patent_noand b.public 阅读全文
posted @ 2021-12-17 10:56 爱上-睡觉 阅读(13) 评论(0) 推荐(0) 编辑