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Oracle Database 23ai SQL Associate Sample Questions:

1. What is the purpose of a correlated subquery?

A) A subquery that combines data from multiple tables
B) A subquery that can be used only with aggregate functions
C) A subquery that depends on the result of another subquery
D) A subquery that references columns from the outer query

2. What is a subquery in SQL?

A) A query used for joining two or more tables
B) A query inside another query
C) A query used to create a table
D) A query that combines data from multiple tables

3. Which type of privilege allows a user to perform administrative tasks, such as creating other users?

A) Table privilege
B) Object privilege
C) System privilege
D) Schema privilege

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

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

5. What type of join does the following query perform?
SELECT *
FROM employees e, departments d
WHERE e.department_id = d.department_id;

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

Solutions: