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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?

A) LOCALTIMESTAMP does not include fractional seconds, while CURRENT_TIMESTAMP does.
B) LOCALTIMESTAMP omits time zone information, while CURRENT_TIMESTAMP includes it.
C) LOCALTIMESTAMP returns only the date, while CURRENT_TIMESTAMP returns the date and time.
D) Both functions are identical in output.

2. How can you ensure that data is sorted in descending order in a SQL query?

A) Use the DISTINCT keyword
B) Use the ASC keyword
C) Use the ORDER keyword
D) Use the DESC keyword

3. Which statement can be used to undo changes made in a transaction?

A) SAVEPOINT
B) MERGE
C) ROLLBACK
D) COMMIT

4. What will the following query result in?
SELECT e.employee_id, e.manager_id
FROM employees e
WHERE e.manager_id IS NOT NULL;

A) All employees and their IDs
B) Employees who do not have managers
C) Employees who have managers
D) Employees and their managers' IDs

5. What is a subquery in SQL?

A) A query inside another query
B) A query used for joining two or more tables
C) A query used to create a table
D) A query that combines data from multiple tables

Solutions: