INSERT INTO Customer VALUES ('C0001', 'Nabila Rahman', '0896 OK, 2 row(s)
INSERT INTO Service VALUES ('S0001', 'Wash, dry & fold (per  OK, 2 row(s)
INSERT INTO Bill VALUES ('B0001', '2026-09-30 08:15:00', 5,  OK, 1 row(s)
INSERT INTO Bill VALUES ('B0002', '2026-09-30 08:20:00', 2,  OK, 1 row(s)
DELETE FROM Customer WHERE id = 'C0001'                      OK, 1 row(s)
DELETE FROM Customer WHERE id = 'C0002'                      OK, 1 row(s)
UPDATE Customer SET id = 'C0100' WHERE id = 'C0001'          OK, 0 row(s)
SELECT ->
SELECT ->
    B0001 | C0001
    B0002 | C9999
