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Oracle Database 23ai SQL Associate Sample Questions:

1. What does the following SQL query do?
SELECT *
FROM employees e
JOIN employees m ON e.manager_id = m.employee_id;

A) Lists employees who are managers
B) Lists employees without departments
C) Lists employees who are not managers
D) Lists employees and their corresponding managers

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

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

3. Which type of join retrieves only the rows with matching values in both tables?

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

4. Which type of INSERT statement allows inserting rows into multiple tables using a single SELECT query?

A) Insert rows into multiple tables simultaneously
B) Insert rows into a single table based on values in other tables
C) Insert rows into a table only when a condition is met
D) Insert rows into multiple tables without conditions

5. What is a sequence in Oracle Database?

A) A database object that generates a series of unique numeric values
B) A list of numbers stored in a table
C) A predefined set of SQL queries executed in order
D) A type of index used for sorting rows

Solutions: