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Oracle Database 23ai SQL Associate Sample Questions:

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

2. How can you ensure that data is sorted in descending order in a SQL query?

A) Use the DISTINCT keyword
B) Use the ORDER keyword
C) Use the ASC keyword
D) Use the DESC keyword

3. Which SQL clause can be used in Oracle to limit the number of rows returned?

A) WHERE
B) FETCH FIRST n ROWS ONLY
C) GROUP BY
D) DISTINCT

4. Which SQLPlus command displays defined substitution variable values?

A) LIST
B) DEFINE
C) SHOW
D) VERIFY

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

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

Solutions: