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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. What does the following SQL statement do?
SELECT e.employee_id, d.department_name
FROM employees e
JOIN departments d ON e.department_id = d.department_id;

A) Retrieves only departments with no employees
B) Retrieves all employees and their departments
C) Retrieves employees and departments with matching department_id
D) Retrieves only employees without departments

2. Which function is used to extract the year from a date in SQL?

A) YEAR(date)
B) TO_YEAR(date)
C) EXTRACT(YEAR FROM date)
D) GET_YEAR(date)

3. What does the NEXTVAL pseudocolumn do in SQL?

A) Deletes the sequence from the database
B) Resets the sequence to its starting value
C) Retrieves the current value of a sequence without incrementing it
D) Retrieves the next value in a sequence and increments the sequence

4. Which SQL function can be used to replace NULL values with a specified value?

A) REPLACE
B) COALESCE
C) NVL
D) ISNULL

5. Which SET operator returns rows from the first query that are not present in the second query?

A) INTERSECT
B) MINUS
C) UNION ALL
D) UNION

Solutions: