INSERT INTO customers VALUES(1, 'Egger', 'Stefan', 'St. Gallen', '9000');
INSERT INTO customers VALUES(2, 'Müller', 'Sepp', 'St.Gallen', '9000');
INSERT INTO customers VALUES(3, 'Kurt', 'Kurtl', 'St. gallen', '9000');
INSERT INTO customers VALUES(4, 'Kurt', 'Kurtl', 'St.gallen', '9000');
INSERT INTO customers VALUES(5, 'Kurt', 'Kurtl', 'St. Moritz', '9200');