programming-examples/30. Write a query to find all those customers who hold a different grade than any customer of the city Dallas.sql at master - programming-examples - michuIT: Everything is code

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 /*30. Write a query to find all those customers who hold a different grade than any customer of the city Dallas.*/
     SELECT *
     FROM customer
     WHERE NOT grade = ANY
        (SELECT grade
         FROM customer
         WHERE city='Dallas');