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Oracle Database SQL Sample Questions (Q160-Q165):

NEW QUESTION # 160
Evaluate the following SQL statement
SQL>SELECT promo_id, prom _category FROM promotions
WHERE promo_category='Internet' ORDER BY promo_id
UNION
SELECT promo_id, promo_category FROM Pomotions
WHERE promo_category = 'TV'
UNION
SELECT promoid, promocategory FROM promotions WHERE promo category='Radio' Which statement is true regarding the outcome of the above query?

A. It produces an error because the ORDER BY clause should appear only at the end of a compound query-that is, with the last SELECT statement.
B. It produces an error because positional, notation cannot be used in the ORDER BY clause with SBT operators.
C. It executes successfully but ignores the ORDER BY clause because it is not located at the end of the compound statement.
D. It executes successfully and displays rows in the descend ignore of PROMO CATEGORY.

Answer: A

NEW QUESTION # 161
Which three are true about the MERGE statement?

A. It can combine rows from multiple tables conditionally to insert into a single table.
B. It can use subqueries to produce source rows.
C. It can update, insert, or delete rows conditionally in multiple tables.
D. It can use views to produce source rows.
E. It can update the same row of the target table multiple times.
F. It can merge rows only from tables.

Answer: B,C,D

NEW QUESTION # 162
The following are the steps for a correlated subquery, listed in random order:
1) The WHERE clause of the outer query is evaluated.
2) The candidate row is fetched from the table specified in the outer query.
3) The procedure is repeated for the subsequent rows of the table, till all the rows are processed.
4) Rows are returned by the inner query, after being evaluated with the value from the candidate row in the outer query. Identify the option that contains the steps in the correct sequence in which the Oracle server evaluates a correlated subquery.

A. 2,4,1,3
B. 2,1,4,3
C. 4,2,1,3
D. 4,1,2,3

Answer: A

NEW QUESTION # 163
View the Exhibit and examine the structure of the PRODUCT_INFORMATIONand INVENTORIEStables.

You have a requirement from the supplies department to give a list containing PRODUCT_ID, SUPPLIER_ID,and QUANTITY_ON_HANDfor all the products wherein QUANTITY_ON_HANDis less than five.
Which two SQL statements can accomplish the task? (Choose two.)
SELECT i.product_id, i.quantity_on_hand, pi.supplier_id

A. FROM product_information
NATURAL JOIN inventories AND quantity_on_hand < 5;
SELECT i.product_id, i.quantity_on_hand, pi.supplier_id
B. FROM product_information pi JOIN inventories i
ON (pi.product_id=i.product_id)
WHERE quantity_on_hand < 5;
SELECT product_id, quantity_on_hand, supplier_id
C. FROM product_information pi JOIN inventories i
ON (pi.product_id=i.product_id) AND quantity_on_hand < 5;
SELECT i.product_id, i.quantity_on_hand, pi.supplier_id
D. FROM product_information pi JOIN inventories i
ON (pi.product_id=i.product_id)
USING (product_id) AND quantity_on_hand < 5;

Answer: B,C

NEW QUESTION # 164
Which three statements are true about views in an Oracle database?

A. The WITH CHECK clause prevents certain rows from being updated or inserted.
B. Inserting one or more rows using a view whose defining query contains a GROUP BY clause will cause an error.
C. Date Manipulation Language (DML) can always be used on views.
D. Deleting one or more rows using a view whose defining query contains a GROUP BY clause will cause an error.
E. Views can be updated without the need to re-grant privileges on the view.
F. The WITH CHECK clause prevents certain rows from being displayed when querying the view.
G. Tables in the defining query of a view must always exist in order to create the view.

Answer: A,D,E

NEW QUESTION # 165
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