SELECT first_name FROM Professionals UNION SELECT first_name FROM Owners EXCEPT SELECT name FROM Dogs
Which first names are used for professionals or owners but are not used as dog names?
SELECT first_name FROM Professionals UNION SELECT first_name FROM Owners EXCEPT SELECT name FROM Dogs
select first_name from professionals union select first_name from owners except select name from dogs
Which first names are used for professionals or owners but are not used as dog names ?