INSERT INTO UserRoles (user_id, role_id, assigned_at)
VALUES
    (1, 1, '2024-01-01 10:00:00+00:00'),
    (1, 2, '2024-01-02 11:00:00+00:00'),
    (2, 1, '2024-01-03 12:00:00+00:00'),
    (3, 3, '2024-01-04 13:00:00+00:00');