“Actualización de SQLite donde existe” Código de respuesta

Actualización de SQLite donde existe

UPDATE employees
SET hire_date = (SELECT departments.start_date
                 FROM departments
                 WHERE departments.department_id = employees.department_id
                 AND departments.department_name = 'HR')
WHERE EXISTS (SELECT *
              FROM departments
              WHERE departments.department_id = employees.department_id
              AND departments.department_name ='HR');