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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. What is the purpose of using external tables in Oracle Database?

A) To manage data stored in external files using SQL
B) To store backup copies of database tables
C) To create temporary tables for session-specific data
D) To improve the performance of complex queries

2. 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) Inserting data into a table
C) Retrieving duplicate records from a single table
D) Joining two tables without a common column

3. What is the result of the following query?
SELECT employee_id
FROM employees
WHERE EXISTS (SELECT 1 FROM departments WHERE department_id = 10);

A) Employees with salaries greater than 10
B) Employee IDs from departments with no employees
C) Employee IDs from department 10
D) All employee IDs

4. What does the INTERSECT operator do in SQL?

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

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

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

Solutions: