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Oracle Database 23ai SQL Associate Sample Questions:

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

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

2. Which INTERVAL data type would you use to store a period of time in years and months?

A) INTERVAL YEAR TO MONTH
B) INTERVAL MONTH TO DAY
C) INTERVAL DAY TO SECOND
D) INTERVAL MINUTE TO HOUR

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

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

4. Which of the following best describes a relational database?

A) A database where all data is stored as key-value pairs
B) A database that organizes data hierarchically
C) A database that uses a tabular structure with rows and columns to represent relationships between data entities
D) A flat file system with no defined relationships between data

5. Which SQL function calculates the number of months between two dates?
Response:

A) DATE_DIFF
B) TIME_DIFF
C) DATE_CALC
D) MONTHS_BETWEEN

Solutions: