subconsulta en el ejemplo de código sql w3schools

Ejemplo: sql all

Returns true if all of the subquery values meet the passed condition.
Example: Returns the users with a higher number of tasks than the user
with the highest number of tasks in the HR department (id 2)
SELECT first_name, surname, tasks_no
FROM users
WHERE tasks_no > ALL (SELECT tasks FROM user WHERE
department_id = 2);

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Utiliza Nuestro Buscador