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Oracle Database 23ai SQL Associate Sample Questions:

1. What does the INTERSECT operator do in SQL?

A) Combines rows from two queries and includes all duplicates
B) Returns rows that are present in both queries
C) Returns rows from the first query that are not present in the second query
D) Combines all rows from two queries without any conditions

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

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

3. What is required for the queries combined by a SET operator to work correctly?

A) The result sets must have the same number of columns and compatible data types.
B) Both queries must include the WHERE clause.
C) The tables must be joined using a primary key.
D) Both queries must use the GROUP BY clause.

4. What will the following query return?
SELECT EXTRACT(YEAR FROM CURRENT_DATE) AS year FROM dual;

A) The current year in the database time zone
B) The full date in the session time zone
C) An error due to incorrect syntax

5. Which SQL JOIN keyword retrieves all rows from both tables, including those without matches?

A) FULL OUTER JOIN
B) LEFT
C) RIGHT
D) CROSS

Solutions: