1z0-071 Exam Dumps | Examine the description of the PRODUCTS table: (Exhibit) Which two statements execute without errors?

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Question 131/139

Examine the description of the PRODUCTS table:

Which two statements execute without errors?

A. MERGE INTO new_prices n
USING (SELECT * FROM products) p
WHEN MATCHED THEN
UPDATE SET n.price= p.cost* 01
WHEN NOT MATCHED THEN
INSERT(n.prod_id, n.price) VALUES(p.prod_id, cost*.01)
WHERE(p.cost<200);

B. MERGE INTO new_prices n
USING (SELECT * FROM products WHERE cost>150) p
ON (n.prod_id= p.prod_id)
WHEN MATCHED THEN
UPDATE SET n.price= p.cost*.01
DELETE WHERE (p.cost<200);

C. MERGE INTO new_prices n
USING products p
ON (p.prod_id =n.prod_id)
WHEN NOT MATCHED THEN
INSERT (n.prod _id, n.price) VALUES (p.prod_id, cost*.01)
WHERE (p.cost<200);

D. MERGE INTO new_prices n
USING (SELECT * FROM products WHERE cost>150) p
ON (n.prod_id= p.prod_id)
WHEN MATCHED THEN
DELETE WHERE (p.cost<200)

Correct Answer: B

B: True. This MERGE statement should execute without errors. It uses a conditionally filtered selection from the products table as a source to update or delete rows in the new_prices table based on whether the prod_id matches and the cost is greater than 150. The delete operation within a MERGE statement is allowed in Oracle when a WHEN MATCHED clause is specified.
The MERGE statement is correctly structured with a USING clause that includes a subquery with a valid WHERE condition, an ON condition that specifies how to match rows between the source and the target, and a WHEN MATCHED THEN clause that specifies the update and delete operations based on the cost condition.
References:Oracle SQL documentation specifies that within a MERGE statement, you can specify a WHEN MATCHED clause to update and/or delete rows in the target table based on the condition specified after the DELETE keyword.

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