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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. Which SQL statement is used to create a table?

A) CREATE TABLE
B) INSERT
C) ALTER TABLE
D) ADD TABLE

2. Which of the following can be achieved using a correlated subquery?

A) Retrieving duplicate records from a single table
B) Inserting data into a table
C) Joining two tables without a common column
D) Comparing each employee's salary to the average salary of their department

3. Which of the following SET operators combines results from two queries and removes duplicates?

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

4. What does the UNION ALL operation do when selecting matching columns from different tables?
SELECT employee_id, salary FROM employees
UNION ALL
SELECT employee_id, bonus FROM bonuses;

A) Combines the salaries and bonuses for employees, removing duplicates
B) Returns only the employees with salaries and bonuses
C) Returns only employees with duplicate employee IDs in both tables
D) Combines all employee IDs, salaries, and bonuses, including duplicates

5. What will the following query return?
SELECT EXTRACT(YEAR FROM CURRENT_DATE) AS year FROM dual;

A) The current year in the database time zone
B) The full date in the session time zone
C) An error due to incorrect syntax

Solutions: