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Oracle Database 23ai SQL Associate Sample Questions:

1. Which type of join includes rows that do not have matching values in the joined table?

A) CROSS JOIN
B) OUTER JOIN
C) SELF JOIN
D) INNER JOIN

2. What is a subquery in SQL?

A) A query inside another query
B) A query that combines data from multiple tables
C) A query used to create a table
D) A query used for joining two or more tables

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

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

4. What will the following query result in?
SELECT e.employee_id, e.manager_id
FROM employees e
WHERE e.manager_id IS NOT NULL;

A) All employees and their IDs
B) Employees and their managers' IDs
C) Employees who do not have managers
D) Employees who have managers

5. Which function returns the current system date and time in the database session's time zone?

A) SYSDATE
B) CURRENT_TIMESTAMP
C) SYSTEM_TIME
D) LOCAL_TIME

Solutions: