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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(21) 评论(0) 推荐(0)