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Oracle 1Z1-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. Which SQL keyword is used to remove duplicate rows from the result set of a query?

A) DISTINCT
B) DISTINCTROW
C) ONLY
D) UNIQUE

2. What does the following query return?
SELECT employee_id
FROM employees
WHERE department_id IN (SELECT department_id FROM departments WHERE location_id = 1000);

A) Employees with no department
B) Departments located in location ID 1000
C) Employees with salaries greater than 1000
D) Employees working in location ID 1000

3. What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;

A) All department IDs from the departments table
B) All department IDs from the employees table
C) Department IDs that exist in both the departments and employees tables
D) Department IDs that exist only in the employees table

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

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

5. What is the purpose of a correlated subquery?

A) A subquery that can be used only with aggregate functions
B) A subquery that references columns from the outer query
C) A subquery that combines data from multiple tables
D) A subquery that depends on the result of another subquery

Solutions: