我正在嘗試爲MYSQL創建一個組合鍵,但我不知道如何嘗試以下操作;SQL複合鍵語法
CREATE TABLE order_line(
order_id int NOT NULL AUTO_INCREMENT,
car_id int NOT NULL AUTO_INCREMENT,
PRIMARY KEY (order_id, car_id));
ALTER TABLE order_line ADD CONSTRAINT order_line_FK FOREIGN KEY (order_id) REFERENCES orders (order_id);
ALTER TABLE order_line ADD CONSTRAINT order_line_FK2 FOREIGN KEY (car_id) REFERENCES car (car_id);
爲什麼你'auto_increment'外鍵?!? – 2012-03-27 18:38:19