1Z1-047 Latest Exam Braindumps
Question 20: 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;
Correct Answer: B
