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Oracle 1Z1-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

Question 1

What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;

A. Department IDs that exist only in the employees table
B. Department IDs that exist in both the departments and employees tables
C. All department IDs from the employees table
D. All department IDs from the departments table

Question 2

What does the following query return?
SELECT employee_id
FROM employees
WHERE department_id IN (SELECT department_id FROM departments WHERE location_id = 1000);

A. Employees with no department
B. Employees working in location ID 1000
C. Departments located in location ID 1000
D. Employees with salaries greater than 1000

Question 3

What type of join does the following query perform?
SELECT *
FROM employees e, departments d
WHERE e.department_id = d.department_id;

A. CROSS JOIN
B. OUTER JOIN
C. NATURAL JOIN
D. EQUI JOIN

Question 4

How are NULL values treated in relational databases?

A. NULL values are not allowed in relational databases.
B. NULL values are treated as empty strings.
C. NULL values are treated as zero.
D. NULL values represent missing or unknown data.

Question 5

Which INTERVAL data type would you use to store a period of time in years and months?

A. INTERVAL MONTH TO DAY
B. INTERVAL DAY TO SECOND
C. INTERVAL MINUTE TO HOUR
D. INTERVAL YEAR TO MONTH

Solutions: