Exam Code: 1Z0-047 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: Oracle Database SQL Expert
Certification Provider: Oracle
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2021 Apr 1Z0-047 Study Guide Questions:
Q41. View the Exhibit and examine the data in ORDERS_MASTER and MONTHLY_ORDERS tables.
Evaluate the following MERGE statement:
MERGE INTO orders_master o USING monthly_orders m ON (o.order_id = m.order_id) WHEN MATCHED THEN UPDATE SET o.order_total = m.order_total DELETE WHERE (m.order_total IS NULL) WHEN NOT MATCHED THEN INSERT VALUES (m.order_id, m.order_total);
What would be the outcome of the above statement?
A. The ORDERS_MASTER table would contain the ORDER_IDs 1 and 2.
B. The ORDERS_MASTER table would contain the ORDER_IDs 1,2 and 3.
C. The ORDERS_MASTER table would contain the ORDER_IDs 1,2 and 4.
D. The ORDERS_MASTER table would contain the ORDER IDs 1,2,3 and 4.
Q42. Which two statements are true regarding the EXISTS operator used in the correlated subqueries? (Choose two.)
A. The outer query stops evaluating the result set of the inner query when the first value is found.
B. It is used to test whether the values retrieved by the inner query exist in the result of the outer query.
C. It is used to test whether the values retrieved by the outer query exist in the result set of the inner query.
D. The outer query continues evaluating the result set of the inner query until all the values in the result set are processed.
Q43. View the Exhibit and examine the description of the EMPLOYEES table.
You want to calculate the total remuneration for each employee. Total remuneration is the sum of the annual salary and the percentage commission earned for a year. Only a few employees earn commission.
Which SOL statement would you execute to get the desired output?
A. SELECTfirst_name, salary, salary*12+salary*commission_pct "Total"
B. SELECTfirst_name,salary, salary*12+NVL((salary*commission_pct), 0) "Total"
C. SELECTfirst_name, salary, salary*12 + NVL(salary, O)*commission_pct "Total"
D. SELECTfirst_name, salary, salary*12+(salary*NVL2(commission_pct,
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Q44. View the Exhibit and examine the table structure of DEPARTMENTS and LOCATIONS tables.
You want to display all the cities that have no departments and the departments that have not been allocated cities.
Which type of join between DEPARTMENTS and LOCATIONS tables would produce this information as part of its output?
A. NATURAL JOIN
B. FULL OUTERJOIN
C. LEFT OUTERJOIN
D. RIGHT OUTER JOIN
Q45. View the Exhibit and examine the structure of the PRODUCT_INFORMATION and INVENTORIES tables.
You have a requirement from the supplies department to give a list containing PRODUCT_ID, SUPPLIER_ID, and QUANTITY_ON_HAND for all the products wherein QUANTITY_ON_HAND is less than five.
Which two SQL statements can accomplish the task? (Choose two.)
A. SELECT product_id, quantity_on_hand , supplier_id FROM product_information NATURAL JOIN inventories AND quantity_on_hand<5;
B. SELECT i.product_id, i.quantity_on_hand , pi.supplier_id FROM product_information pi JOIN inventoriesi USING (product_id) AND quantity_on_hand < 5;
C. 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;
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) AND quantity_on_hand < 5;
Q46. 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.
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Q47. View the Exhibit and examine the description of the ORDERS table.
Evaluate the following SQL statement:
SELECT order_id, customer_id
WHERE order_date > 'June 30 2001'
Which statement is true regarding the execution of this SQL statement?
A. It would not execute because 'June 30 2001' in the WHERE condition is not enclosed within double quotation marks.
B. It would execute and would return ORDER_ID and CUSTOMER_ID for all records having ORDER_DATE greater than 'June 30 2001'.
C. It would not execute because 'June 30 2001' in the WHERE condition cannot be converted implicitly and needs the use of the TO_DATE conversion function for proper execution.
D. It would not execute because 'June 30 2001' in the WHERE condition cannot be converted implicitly and needs the use of the TO_CHAR conversion function for proper execution.
Q48. 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.
Q49. Evaluate the following ALTER TABLE statement:
ALTER TABLE orders
SET UNUSED order_date;
Which statement is true?
A. The DESCRIBE command would still display the ORDER_DATE column.
B. ROLLBACK can be used to get back the ORDER_DATE column in the ORDERS table.
C. The ORDER_DATE column should be empty for the ALTER TABLE command to execute successfully.
D. After executing the ALTER TABLE command, you can add a new column called ORDER_DATE to the ORDERS table.
Q50. You need to create a table for a banking application with the following considerations:
1) You want a column in the table to store the duration of the credit period.
2) The data in the column should be stored in a format such that it can be easily added and subtracted with 3) date type data without using the conversion functions.
4) The maximum period of the credit provision in the application is 30 days.
5) The interest has to be calculated for the number of days an individual has taken a credit for.
Which data type would you use for such a column in the table?
A. INTERVAL YEAR TOMONTH
B. INTERVALDAYTO SECOND
C. TIMESTAMP WITHTIMEZONE
D. TIMESTAMP WITH LOCAL TIME ZONE