[Solved] Joining 2 fields into another table

by 


$query = "SELECT a.*,b.mobilenumber,b.firstname,b.lastname 
          FROM user_address a 
            left join user b on a.user_id=b.user_id 
          WHERE a.user_id IN 
            (SELECT id FROM user WHERE email="".$email."")";

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solved Joining 2 fields into another table