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Q151. View the Exhibit and examine the structure of the EMPLOYEES and DEPARTMENTS tables.
Which SET operator would you use in the blank space in the following SQL statement to list the departments where all the employees have managers?
SELECT department_id FROM departments
SELECT department_id FROM employees WHERE manager_id IS NULL;
D. UNION ALL
Q152. View the Exhibit and examine the descriptions of ORDER_ITEMS and ORDERS tables.
You want to display the CUSTOMER_ID, PRODUCT_ID, and total (UNIT_PRICE multiplied by QUANTITY) for the order placed. You also want to display the subtotals for a CUSTOMER_ID as well as for a PRODUCT ID for the last six months.
Which SQL statement would you execute to get the desired output?
A. SELECT o.customer_id, oi.product_id, SUM(oi.unit_price*oi. quantity) "Total FROM order_items oi JOIN orders o ON oi.order_id=o.order_id GROUP BY ROLLUP (o.customer_id, oi.product_id) WHERE MONTHS_BETWEEN(order_ date,SYSDATE)<=6;
B. SELECT o.customer_id, oi.product_id, SUM(oi.unit_price*oi. quantity) "Total FROM order_items oi JOIN orders o ON oi.order_id=o.order_id GROUP BY ROLLUP (o.customer_id, oi.product_id) HAVING MONTHS_BETWEEN(order_ date,SYSDATE)<=6;
C. SELECT o.customer_id, oi.product_id, SUM(oi.unit_price*oi. quantity) "Total FROM order_items oi JOIN orders o ON oi.order_id=o.order_id GROUP BY ROLLUP (o.customer_id, oi.product_id) WHERE MONTHS_BETWEEN(order_ date,SYSDATE)>=6;
D. SELECT o.customer_id, oi.product_id, SUM(oi.unit_price*oi. quantity) "Total FROM order_items oi JOIN orders o ON oi.order_id=o.order_id WHERE MONTHS_BETWEEN(order date,SYSDATE)<=6 GROUP BY ROLLUP (o.customer_id, oi.product_id);
Q153. Evaluate the following CREATE SEQUENCE statement:
CREATE SEQUENCE seql START WITH 100 INCREMENT BY 10 MAXVALUE 200 CYCLE NOCACHE;
The sequence SEQ1 has generated numbers up to the maximum limit of 200. You issue the following SQL statement:
SELECT seql.nextval FROM dual;
What is displayed by the SELECT statement?
D. an error
Q154. Evaluate the following command:
CREATE TABLE employees (employee_id NUMBER(2) PRIMARY KEY, last_name VARCHAR2(25) NOT NULL, department_id NUMBER(2), job_id VARCHAR2(8), salary NUMBER(10,2));
You issue the following command to create a view that displays the IDs and last names of the sales staff in the organization:
CREATE OR REPLACE VIEW sales_staff_vu AS SELECT employee_id, last_name job_id FROM employees WHERE job_id LIKE 'SA_%' WITH CHECK OPTION;
Which statements are true regarding the above view? (Choose all that apply.)
A. It allows you to insert details of allnewstaff into the EMPLOYEES table.
B. Itallowsyou todeletethedetails of the existing sales staff fromtheEMPLOYEES table.
C. It allows you to updatethejob ids oftheexisting sales staff to any other job id in the EMPLOYEES table.
D. It allows you to insert the IDs, last names and job ids of the sales staff from theviewif it is used in multitable INSERT statements.
Q155. Which statement is true regarding synonyms?
A. Synonyms can be created for tables but not views.
B. Synonyms are used to reference only those tables that are owned by another user.
C. A public synonym and a private synonym can exist with the same name for the same table.
D. The DROP SYNONYM statement removes the synonym, and the status of the table on which the synonym has been created becomes invalid.
Q156. View the Exhibit and examine DEPARTMENTS and the LOCATIONS tables.
Evaluate the following SOL statement:
SELECT location_id, city FROM locations I WHERE NOT EXISTS (SELECT location_id FROM departments WHERE location_id <> I. location_id);
This statement was written to display LOCATION_ID and CITY where there are no departments located. Which statement is true regarding the execution and output of the command?
A. The statementwouldexecute andwouldreturn the desired results.
B. Thestatement wouldnotexecute becausethe= comparison operatorismissing in the WHERE clause of theouterquery.
C. Thestatement wouldexecutebutitwillreturnzerorows because the WHERE clause intheinner query shouldhavethe= operatorinstead of <>.
D. The statement wouldnot execute because the WHERE clause in the outer query is missing the column name for comparison with the inner query result.