INSERT INTO AT_plz VALUES
(2241,  3560, 'Schönkirchen-Reyersdorf'),
(2165,  5013, 'Drasenhofen'),
(2134,  5115, 'Staaz-Kautendorf');

UPDATE AT_ort SET name = 'Etzmannsdorf am Kamp' WHERE okz = 3938;

DELETE FROM AT_plz WHERE (plz, okz) = (2231,  5011);