View the Exhibit button and examine the structures of ORDERS and ORDER_ITEMS tables.
In the ORDERS table, ORDER_ID is the PRIMARY KEY and in the ORDER_ITEMS table,
ORDER_ID and LINE_ITEM_ID form the composite primary key.
Which view can have all the DML operations performed on it?
A.
CREATE VIEW V1
AS SELECT order_id, product_id
FROM order_items;
B.
CREATE VIEW V4(or_no, or_date, cust_id)
AS SELECT order_id, order_date, customer_id
FROM orders
WHERE order_date < 30-mar-2007′
WITH CHECK OPTION;
C.
CREATE VIEW V3
AS SELECT o.order_id, o.customer_id, i.product_id
FROM orders o, order_items i
WHERE o.order_id=i. order_id;
D.
CREATE VIEW V2
AS SELECT order_id, line_item_id, unit_price*quantity total
FROM order items;