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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. What does the following SQL query do?
SELECT *
FROM employees e
JOIN employees m ON e.manager_id = m.employee_id;

A) Lists employees who are managers
B) Lists employees without departments
C) Lists employees and their corresponding managers
D) Lists employees who are not managers

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

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

3. What does the INTERSECT operator do in SQL?

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

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. Which clause in an UPDATE statement typically uses a subquery to assign values to columns?

A) FROM
B) WHERE
C) HAVING
D) SET

Solutions: