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Oracle 1Z1-171 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) Both functions are identical in output.
C) LOCALTIMESTAMP omits time zone information, while CURRENT_TIMESTAMP includes it.
D) LOCALTIMESTAMP returns only the date, while CURRENT_TIMESTAMP returns the date and time.

2. What is the primary purpose of an index in SQL?

A) To store metadata about a table
B) To ensure uniqueness of values in a column
C) To enforce data integrity constraints
D) To improve the performance of data retrieval queries

3. Which of the following data dictionary views provides information about constraints on tables?

A) DBA_CONSTRAINTS
B) USER_CONSTRAINTS
C) All of the above
D) ALL_CONSTRAINTS

4. What will the following query do?
DELETE FROM employees
WHERE department_id = 20;

A) Delete all rows where department_id is 20
B) Raise an error because DELETE cannot use a WHERE clause
C) Delete all rows in the employees table
D) Delete the department_id column in the employees table

5. 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 and their managers' IDs
C) Employees who have managers
D) Employees who do not have managers

Solutions: