DELETE FROM Reservation;
DELETE FROM Client;
DELETE FROM Spectacle;

INSERT INTO Client VALUES (1, 50);
INSERT INTO Client VALUES (2, 50);
INSERT INTO Spectacle VALUES (1, 250, 250, 20);
COMMIT;

SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
