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Oracle Database SQL Sample Questions (Q153-Q158):

NEW QUESTION # 153
View the exhibit and examine the description of the PRODUCT_INFORMATION table.

Which SQL statement would retrieve from the table the number of products having LIST_PRICE as NULL?

A. SELECT COUNT (DISTINCT list_price)FROM product_informationWHERE list_price is NULL
B. SELECT COUNT (NVL(list_price, 0))FROM product_informationWHERE list_price is NULL
C. SELECT COUNT (list_price)FROM product_informationWHERE list_price i= NULL
D. SELECT COUNT (list_price)FROM product_informationWHERE list_price is NULL

Answer: B

NEW QUESTION # 154
You want to display 5 percent of the rows from the SALEStable for products with the lowest AMOUNT_SOLD and also want to include the rows that have the same AMOUNT_SOLDeven if this causes the output to exceed 5 percent of the rows.
Which query will provide the required result?
SELECT prod_id, cust_id, amount_sold

A. FROM sales
ORDER BY amount_sold
FETCH FIRST 5 PERCENT ROWS ONLY;
B. FROM sales
ORDER BY amount_sold
FETCH FIRST 5 PERCENT ROWS WITH TIES ONLY;
SELECT prod_id, cust_id, amount_sold
C. FROM sales
ORDER BY amount_sold
FETCH FIRST 5 PERCENT ROWS WITH TIES;
SELECT prod_id, cust_id, amount_sold
D. FROM sales
ORDER BY amount_sold
FETCH FIRST 5 PERCENT ROWS ONLY WITH TIES;
SELECT prod_id, cust_id, amount_sold

Answer: C

NEW QUESTION # 155
SCOTT is a user in the database.
Evaluate the commands issued by the DBA:

Which statement is true regarding the execution of the above commands?

A. Statement 1 would not execute because the IDENTIFIED BY <password> clause is missing.
B. Statement 1 would not execute because the WITH GRANT option is missing.
C. Statement 2 would not execute because system privileges and object privileges cannot be granted together in a single GRANT command.
D. Statement 3 would not execute because role and system privileges cannot be granted together in a single GRANT statement.

Answer: C

NEW QUESTION # 156
Examine the description of the EMPLOYEES table:

Which statement increases each employee's SALARY by the minimum SALARY for their DEPARTM ENT_ID?

A. UPDATE employees e1
SET salary=
(SELECT e1.salary + MIN(e2.salary)
FROM employees e2
WHERE e1. department_ id = e2.department_id);
B. UPDATE employees e1
SET salary =(SELECT e2. salary + MIN(e2.salary)
FROM employees e2
WHERE e1.department_ id = e2. department_id GROUP BY e2. department_id) ;
C. UPDATE employees e1
SET salary = salary +
(SELECT MIN(e1. salary)
FROM employees e2
WHERE e1.department_id = e2 .department_id);
D. UPDATE employees e1
SET salary = salary+(SELECT MIN (salary)
FROM employees e2) ;

Answer: A

Explanation:
The correct statement to increase each employee's salary by the minimum salary for their department is:
D . This option correctly increases each employee's salary by the minimum salary in their department. The subquery calculates the minimum salary for the department of the current row being updated (e1) in the outer UPDATE statement. The subquery does not use GROUP BY since it returns a single value - the minimum salary for the matching department.
A, B, and C are incorrect. Specifically:
A uses a subquery with an aggregate function combined with GROUP BY, which is not needed and will result in an error.
B incorrectly references MIN(e1.salary) within the subquery, which is incorrect since e1 is the alias for the outer query's table and should not be used within the subquery.
C sets the salary to itself plus the minimum salary across all employees, not filtered by the department.
Reference:
Oracle Database SQL Language Reference, 12c Release 1 (12.1): "UPDATE"

NEW QUESTION # 157
The user SCOTTwho is the owner of ORDERSand ORDER_ITEMStables issues this GRANTcommand:
GRANT ALL
ON orders, order_items
TO PUBLIC;
What must be done to fix the statement?

A. Separate GRANTstatements are required for ORDERSand ORDER_ITEMS tables.
B. ALLshould be replaced with a list of specific privileges.
C. PUBLICshould be replaced with specific usernames.
D. WITH GRANT OPTIONshould be added to the statement.

Answer: A

Explanation:
Explanation/Reference:
References:
http://docs.oracle.com/javadb/10.8.3.0/ref/rrefsqljgrant.html

NEW QUESTION # 158
......

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