The Oracle Database SQL Expert certification validates crucial skills, making the 1Z1-047 a rigorous challenge. Tackle it head-on with Actual4Labs, where you get instant access to 264 meticulously updated questions for 2026.

Oracle 1Z1-047 Exam Overview:

Oracle 1Z1-047 Exam Syllabus Topics:

Oracle 1Z1-047 Exam FAQs

Oracle Database SQL Expert Sample Questions:

Question 1

View the Exhibit and examine the descriptions of the DEPT and LOCATIONS tables.
You want to update the CITY column of the DEPT table for all the rows with the corresponding value in the CITY column of the LOCATIONS table for each department.
Which SOL statement would you execute to accomplish the task?

A. UPDATE dept d
SET city = (SELECT city
FROM locations I
WHERE d.location_id = l.location_id);
B. UPDATE dept d
SET city = ALL (SELECT city
FROM locations I
WHERE d.location_id = l.location_id);
C. UPDATE deptd
SET city = ANY (SELECT city
FROM locations I);
D. UPDATE deptd
SET city = (SELECT city
FROM locations I)
WHERE d.location_id = l.location_id;

Question 2

Which statement is true regarding synonyms?

A. Synonyms can be created for tables but not views.
B. A public synonym and a private synonym can exist with the same name for the same table.
C. The DROP SYNONYM statement removes the synonym, and the status of the table on which the synonym has been created becomes invalid.
D. Synonyms are used to reference only those tables that are owned by another user.

Question 3

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 statement would not execute because the WHERE clause should have the OR logical operator instead of AND.
B. The statement would not execute because in the SELECT clause, the UNIT_PRICE column is placed after the column having the aggregate function.
C. The statement would execute and give you the desired result.
D. The statement would not execute because the aggregate function is used in the WHERE clause.

Question 4

Given below is a list of datetime data types and examples of values stored in them in a random
order:
Datatype Example
1) INTERVAL YEAR TO MONTH a) 2003-04-15 8:00:00 -8:00'
2) TIMESTAMP WITH LOCAL TIME ZONE b) '-K)6 03:30:16.000000'
3) TIMESTAMP WITH TIME ZONE c) '17-JUN-03 12.00.00.000000 AM'4)INTERVAL DAY TO
SECOND d) '402-00'
Identify the option that correctly matches the data types with the values.

A. 1-d.2-c.3-a.4-b
B. 1-b.2-a, 3-d, 4-c
C. 1-b.2-a.3-c.4-d
D. 1-d.2-c.3-b.4-a

Question 5

View the Exhibit and examine the structure of the EMPLOYEES table.
You want to display all employees and their managers having 100 as the MANAGER_ID. You want the output in two columns: the first column would have the LAST_NAME of the managers and the second column would have LAST_NAME of the employees.
Which SQL statement would you execute?

A. SELECT m.last_name "Manager", e.last_name "Employee"
FROM employees m JOIN employees e
WHERE m.employee_id = e.manager_id AND e.manager_id=100;
B. SELECT m.last_name "Manager", e.last_name "Employee"
FROM employees m JOIN employees e
ON m.employee_id = e.manager_id
WHERE e.manager_id=100;
C. SELECT m.last_name "Manager", e.last_name "Employee"
FROM employees m JOIN employees e
ON m.employee_id = e.manager_id
WHERE m.manager_id=100;
D. SELECT m.last_name "Manager", e.last_name "Employee"
FROM employees m JOIN employees e
ON e.employee_id = m.manager_id
WHERE m.manager_id=100;

Solutions: