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2021 Jul oca 1z0-047:
Q71. View the Exhibit and examine the description of the ORDER_ITEMS table.
The following SQL statement was written to retrieve the rows for the PRODUCT_ID that has a UNIT_PRICE of more than 1,000 and has been ordered more than five times:
SELECT product_id, COUNT(order_id) total, unit_price FROM order_items WHERE unit_price>1000 AND COUNT(order_id)>5 GROUP BY product_id, unit_price;
Which statement is true regarding this SQL statement?
A. The statementwouldexecute and give youthedesired result.
B. Thestatementwould not execute becausetheaggregatefunction is usedintheWHEREclause.
C. The statementwouldnot execute because the WHERE clause should havetheOR logical operator insteadofAND.
D. The statement wouldnot execute because intheSELECT clause, the UNIT_PRICE column is placed afterthecolumn having the aggregate function.
Answer: B
Q72. View the Exhibit and examine the description of the ORDERS table.
You need to display CUSTOMER_ID for all customers who have placed orders more than three times in the last six months. You issued the following SQL statement:
SELECT customer_id,COUNT(order_id) FROM orders WHERE COUNT(order_id)>3 AND order_date BETWEEN ADD_MONTHS(SYSDATE,-6) AND SYSDATE GROUP BY customer_id;
Which statement is true regarding the execution of the above statement?
A. It would execute successfully and provide the desired result.
B. It would not execute because the WHERE clause cannot have an aggregate function.
C. It would not execute because the ORDER_ID column is not included in the GROUP BY clause.
D. It would not execute because the GROUP BY clause should be placed before the WHERE clause.
Answer: B
Q73. Which mandatory clause has to be added to the following statement to successfully create an external table called EMPDET?
CREATE TABLE empdet
(empno CHAR(2), ename CHAR(5), deptno NUMBER(4))
ORGANIZATION EXTERNAL
(LOCATION ('emp.daf));
A. TYPE
B. REJECTLIMIT
C. DEFAULT DIRECTORY
D. ACCESS PARAMETERS
Answer: C
Q74. View the Exhibit and examine the description of the PRODUCT_INFORMATION table.
SELECT product_name, list_price, min_price, list_price - min_price Difference FROM product_information
Which options when used with the above SQL statement can produce the sorted output in ascending order of the price difference between LIST_PRICE and MIN_PRICE? (Choose all that apply.)
A. ORDERBY4
B. ORDER BY MIN_PRICE
C. ORDER BY DIFFERENCE
D. ORDER BY LIST_PRICE
E. ORDERBYLIST_PRICE–MIN_PRICE
Answer: ACE
Q75. Evaluate the following statement: INSERT ALL WHEN order_total < 10000 THEN INTO small_orders WHEN order_total > 10000 AND order_total < 20000 THEN INTO medium_orders WHEN order_total > 2000000 THEN INTO large_orders SELECT order_id, order_total, customer_id FROM orders;
Which statement is true regarding the evaluation of rows returned by the subquery in the INSERT statement?
A. They areevaluatedby allthe three WHENclauses regardlessofthe resultsof the evaluation ofany other WHEN clause.
B. They are evaluated by thefirst WHENclause. If the condition is true, then the row would be evaluated by the subsequent WHEN clauses.
C. They are evaluated by the first WHEN clause. If the condition isfalse,thenthe row wouldbeevaluated by the subsequentWHENclauses.
D. TheINSERT statement would give an error becausetheELSE clause is notpresent forsupport in case none of theWHENclauses are true.
Answer: A
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Q76. View the Exhibit and examine the structure of the ORDERS and ORDER_ITEMS tables.
In the ORDERS table, ORDER_ID is the PRIMARY KEY and ORDER_DATE has the DEFAULT value as SYSDATE.
Evaluate the following statement:
UPDATE orders
SET order_date=DEFAULT
WHERE order_id IN (SELECT order_id FROM order_items
WHERE qty IS NULL);
What would be the outcome of the above statement?
A. The UPDATEstatementwould not work because the main queryandthe subquery usedifferenttables.
B. The UPDATEstatement would not work becausetheDEFAULTvaluecan be used only in INSERT statements.
C. TheUPDATEstatementwould changeall ORDER_DATE values to SYSDATE provided the current ORDER_DATE is NOT NULLand QTYis NULL
D. The UPDATE statement would change all the ORDER_DATE values to SYSDATE irrespective of what the current ORDER_DATE value is for all orders where QTY is NULL
Answer: D
Q77. Which two statements are true regarding the GROUP BY clause in a SQL statement? (Choose two.)
A. You can use column alias in the GROUP BY clause.
B. Using the WHERE clause after the GROUP BY clause excludes the rows after creating groups.
C. The GROUP BY clause is mandatory if you are using an aggregate function in the SELECT clause.
D. Using the WHERE clause before the GROUP BY clause excludes the rows before creating groups.
E. If the SELECT clause has an aggregate function, then those individual columns without an aggregate function in the SELECT clause should be included in the GROUP BY clause.
Answer: DE
Q78. View the Exhibit and examine the description of EMPLOYEES and DEPARTMENTS tables.
You want to display the EMPLOYEE_ID, LAST_NAME, and SALARY for the employees who get
the maximum salary in their respective departments. The following SQL statement was written:
WITH
SELECT employee_id, last_name, salary
FROM employees
WHERE (department_id, salary) = ANY (SELECT*
FROM dept_max)
dept_max as (SELECT d.department_id, max(salary)
FROM departments d JOIN employees j
ON (d. department_id = j. department_id)
GROUP BY d. department_id);
Which statement is true regarding the execution and the output of this statement?
A. The statement would execute and give the desired results.
B. The statement would not execute because the = ANY comparison operator is used instead of=.
C. The statement would not execute because the main query block uses the query name before it is even created.
D. The statement would not execute because the comma is missing between the main query block and the query name.
Answer: C
Q79. Evaluate the following statements:
CREATE TABLE digits
(id NUMBER(2),
description VARCHAR2(15));
INSERT INTO digits VALUES (1,'ONE’);
UPDATE digits SET description =TWO'WHERE id=1;
INSERT INTO digits VALUES (2.’TWO’);
COMMIT;
DELETE FROM digits;
SELECT description FROM digits
VERSIONS BETWEEN TIMESTAMP MINVALUE AND MAXVALUE;
What would be the outcome of the above query?
A. Itwouldnot display any values.
B. It would displaythevalue TWO once.
C. Itwould display the valueTWOtwice.
D. Itwould display the values ONE, TWO, andTWO.
Answer: C
Q80. View the Exhibit and examine the structure of the MARKS_DETAILS and MARKStables.
Which is the best method to load data from the MARKS DETAILStable to the MARKStable?
A. Pivoting INSERT
B. Unconditional INSERT
C. Conditional ALL INSERT
D. Conditional FIRST INSERT
Answer: A