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Oracle Database SQL Sample Questions (Q134-Q139):

NEW QUESTION # 134
Examine these SQL statements which execute successfully:

Which two statements are true after execution?

A. The foreign key constraint will be enabled and IMMEDIATE.
B. The foreign key constraint will be disabled.
C. The foreign key constraint will be enabled and DEFERRED.
D. The primary key constraint will be enabled and DEFERRED.
E. The primary key constraint will be enabled and IMMEDIATE.

Answer: A,D

NEW QUESTION # 135
View the Exhibit and examine the structure of the EMPLOYEES and JOB_HISTORY tables.

Examine this query which must select the employee IDs of all the employees who have held the job SA_MAN at any time during their employment.
SELECT employee_id
FROM employees
WHERE job_id = 'SA_MAN'
-------------------------------------
SELECT employee_id
FROM job_history
WHERE job_id='SA_MAN';
Choose two correct SET operators which would cause the query to return the desired result. (Choose two.)

A. INTERSECT
B. UNION
C. MINUS
D. UNION ALL

Answer: B,D

NEW QUESTION # 136
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.)

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

Answer: A,D

NEW QUESTION # 137
The CUSTOMERS table has a CUST_CREDT_LIMIT column of data type number.
Which two queries execute successfully?

A. SELECT NVL(cust_credit_limit * .15,'Not Available') FROM customers;
B. SELECT TO_CHAR(NVL(cust_credit_limit * .15,'Not Available')) FROM customers;
C. SELECT NVL2(cust_credit_limit,TO_CHAR(cust_credit_limit * .15),'NOT Available') FROM customers;
D. SLECT NVL(TO_CHAR(cust_credit_limit * .15),'Not available') from customers;
E. SELECT NVL2(cust_credit_limit * .15,'Not Available') FROM customers;

Answer: B,C

Explanation:
A). True - The TO_CHAR function is used correctly here to convert the numeric value to a string, and NVL handles the case where cust_credit_limit might be NULL. The expression inside NVL computes 15% of the credit limit or displays 'Not Available' if the credit limit is NULL. The syntax is correct.
B). False - The NVL2 function requires three parameters: the expression to check for NULL, the value to return if it's not NULL, and the value to return if it is NULL. The given usage lacks the required parameters and syntax.
C). False - The NVL function expects both parameters to be of the same data type. Since the second parameter
'Not Available' is a string, it causes a data type conflict with the numerical result of the first parameter.
D). False - The keyword SELECT is misspelled as SLECT, making the syntax incorrect.
E). True - This query uses NVL2 correctly by checking if cust_credit_limit is not NULL, then applying TO_CHAR to compute 15% of it and converting it to string, or returning 'NOT Available' if it is NULL. The syntax and function usage are correct.

NEW QUESTION # 138
Which three statements are true about performing DML operations on a view with no Instead of triggers defined?

A. Delete statements can always be done on a table tough a view.
B. Views cannot be used to add rows to an underlying table if the table has columns with NOT NULL constraints lacking default values which are not referenced in the defining query of the view.
C. Insert statements can always be done on a table through a view.
D. Views cannot be used to add or modify rows in an underlying table if the defining query of the view contains the DISTINCT keyword.
E. WITH CHECK clause has no effect when deleting rows from the underlying table through the view.
F. Views cannot be used to query rows from an underlying table if the table has a PRIMARY KEY and the PRIMARY KEY columns are not referenced in the defining query of the view.

Answer: B,D,F

NEW QUESTION # 139
......

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Oracle Database SQL Sample Questions (Q134-Q139):

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