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Oracle Database 23ai SQL Associate Sample Questions:

1. What happens when the TRUNCATE TABLE statement is executed?

A) Deletes all rows in the table without logging the operation for rollback
B) Deletes only the last row in the table
C) Deletes the table structure permanently
D) Deletes all rows in the table and logs the operation for rollback

2. Which function is used to extract the year from a date in SQL?

A) TO_YEAR(date)
B) GET_YEAR(date)
C) EXTRACT(YEAR FROM date)
D) YEAR(date)

3. What will the following query do?
SELECT employee_id, salary
FROM employees
WHERE salary > (SELECT AVG(salary) FROM employees);

A) Return employees with a salary above the average salary
B) Return all employees and their salaries
C) Return employees with a salary below the average salary
D) Return employees with a salary equal to the average salary

4. What does the following query return?
SELECT ROUND(123.456, 1) AS rounded_value FROM dual;

A) 123.5
B) 124
C) 123.4
D) 123.45

5. Which of the following statements creates an ascending sequence starting at 100 and incrementing by 10?

A) CREATE SEQUENCE seq_1 START WITH 10 INCREMENT BY -100;
B) CREATE SEQUENCE seq_1 START WITH 10 INCREMENT BY 100;
C) CREATE SEQUENCE seq_1 START WITH 100 INCREMENT BY -10;
D) CREATE SEQUENCE seq_1 START WITH 100 INCREMENT BY 10;

Solutions: