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Oracle Database 23ai SQL Associate Sample Questions:

1. What is the result of the following SQL query?
SELECT COALESCE(NULL, 100, 200) AS result FROM dual;

A) 100
B) 200
C) 300
D) NULL

2. What does the INTERSECT operator do in SQL?

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

3. Which SET operator returns rows from the first query that are not present in the second query?

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

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

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

5. What does the INTERSECT operator do in SQL?

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

Solutions: