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Oracle Database 23ai SQL Associate Sample Questions:

1. What will the following query do?
DELETE FROM employees
WHERE department_id = 20;

A) Raise an error because DELETE cannot use a WHERE clause
B) Delete all rows in the employees table
C) Delete the department_id column in the employees table
D) Delete all rows where department_id is 20

2. What does the COMMIT statement do in SQL?

A) Begins a new transaction
B) Discards all pending changes in the transaction
C) Rolls back changes to a previous state
D) Saves all pending changes to the database permanently

3. Which of the following SQL commands retrieves data from a relational database?

A) UPDATE
B) INSERT
C) SELECT
D) DELETE

4. What is a role in Oracle Database?

A) A predefined SQL statement stored in the database
B) A user-defined function
C) A database object used to enforce constraints
D) A set of privileges that can be granted to users or other roles

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

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

Solutions: