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Oracle 1Z1-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. Which of the following is true about foreign key constraints in SQL?

A) They enforce the uniqueness of values in a column.
B) They ensure that a column only contains NULL values.
C) They define a relationship between two tables.

2. 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

3. Which command creates a new role in Oracle Database?

A) CREATE ROLE role_name;
B) ADD ROLE role_name;
C) CREATE NEW ROLE role_name;

4. Which function is used to extract the year from a date in SQL?

A) TO_YEAR(date)
B) EXTRACT(YEAR FROM date)
C) YEAR(date)
D) GET_YEAR(date)

5. What does the following SQL statement do?
ALTER TABLE employees DROP COLUMN salary;

A) Removes duplicate rows from the employees table
B) Sets the salary column to NULL for all rows
C) Drops the salary column from the employees table
D) Deletes the employees table

Solutions: