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Exam Code: 1Z0-171
Exam Name: Oracle Database 23ai SQL Associate
Updated: Jun 01, 2026
Q & A: 111 Questions and Answers
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1. Which clause in a SQL SELECT statement is used to define the columns to be retrieved?
A) GROUP BY
B) FROM
C) WHERE
D) SELECT
2. Which SQL keyword is used to remove duplicate rows from the result set of a query?
A) DISTINCT
B) DISTINCTROW
C) UNIQUE
D) ONLY
3. 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) All department IDs from the employees table
C) All department IDs from the departments table
D) Department IDs that exist in both the departments and employees tables
4. What does the EXISTS operator check in a subquery?
A) If the subquery references the outer query
B) If the subquery returns a specific number of rows
C) If the subquery returns any rows
D) If the subquery contains only unique values
5. What does the NEXTVAL pseudocolumn do in SQL?
A) Retrieves the current value of a sequence without incrementing it
B) Deletes the sequence from the database
C) Resets the sequence to its starting value
D) Retrieves the next value in a sequence and increments the sequence
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: A | Question # 3 Answer: D | Question # 4 Answer: C | Question # 5 Answer: D |
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