SELECT DB1.20180320.email
   FROM DB1.20180320
   left join DB2.20180319 on DB1.20180320.email = DB2.20180319.email
           AND DB2.20180319.Status = 'active'
   WHERE DB2.20180319.email IS null;

(SELECT DB2.20180319.email
  FROM DB2.20180319
  WHERE Status = 'active'
  AND DB2.20180319.email IS NOT NULL)