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

2. Which SQL keyword is used to define a substitution variable in a SQL statement?

A) VAR
B) DEFINE
C) SET
D) SUBSTITUTION

3. What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;

A) All department IDs from the employees table
B) All department IDs from the departments table
C) Department IDs that exist only in the employees table
D) Department IDs that exist in both the departments and employees tables

4. 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)

5. What does the following SQL query return?
SELECT employee_id, salary * 12 AS annual_salary FROM employees;

A) Employee IDs and their annual salaries
B) Salaries multiplied by 12 and stored in a new table
C) Monthly salaries of all employees
D) Only employees with salaries greater than 12

Solutions: