41、(8-14) choose two
View the Exhibit and examine the structure of the ORDERS table.
The columns ORDER_MODE and ORDER_TOTAL have the default values 'direct' and 0 respectively.
Which two INSERT statements are valid? (Choose two.)
A) INSERT INTO
(SELECT order_id,order_date,customer_id FROM orders)
VALUES (1,'09-mar-2007', 101);
B) INSERT INTO orders
(order_id,order_date,order_mode,
customer_id,order_total)
VALUES(1,TO_DATE(NULL), 'online', 101, NULL);
C) INSERT INTO orders
VALUES (1, '09-mar-2007', 'online','',1000);
D) INSERT INTO orders
(order_id,order_date,order_mode,order_total)
VALUES (1,'10-mar-2007','online',1000);
E) INSERT INTO orders
VALUES (1,'09-mar-2007', DEFAULT, 101, DEFAULT);
Answer:AE
(解析：验证过，考点是考如何插入默认值的列，实际插入过程中可以忽略列，或者用 default 关键字显示
插入。D 语法没有错误，但是 customer_id 是非空约束，所以无法插入)