Mysql 查询一张表在另一张表中不存在的数据

SELECT 
   		f.*
   	FROM 
   		law_firm f
   	WHERE 
    NOT EXISTS (
        SELECT 
        		p.* 
        FROM 
        		push_record p
       	WHERE 
       			f.id = p.fk_object_id
     )

 

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