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Oracle Database 23ai SQL Associate Sample Questions:

1. Which of the following SET operators combines results from two queries and removes duplicates?

A) UNION
B) UNION ALL
C) INTERSECT
D) MINUS

2. What is the result of using the following SQL query?
SELECT 100 + NULL AS result;

A) 0
B) 100
C) An error
D) NULL

3. Which of the following can be achieved using a correlated subquery?

A) Comparing each employee's salary to the average salary of their department
B) Joining two tables without a common column
C) Retrieving duplicate records from a single table
D) Inserting data into a table

4. Which command grants a user the ability to query data from a specific table?

A) GRANT SELECT ON table_name TO user_name;
B) ENABLE SELECT ON table_name TO user_name;
C) ALLOW SELECT ON table_name TO user_name;
D) GRANT ALL ON table_name TO user_name;

5. What is the output of the following query?
SELECT CURRENT_DATE FROM dual;

A) The current date in the database time zone
B) The current date in the session time zone
C) The current date and time in the database time zone
D) The current date and time in UTC

Solutions: