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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. What does the following SQL query do?
SELECT *
FROM employees e
JOIN employees m ON e.manager_id = m.employee_id;

A) Lists employees who are not managers
B) Lists employees without departments
C) Lists employees who are managers
D) Lists employees and their corresponding managers

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) All employee IDs
D) Employee IDs from department 10

3. The column data type is converted to a primary key.

A) CREATE INDEX
B) CREATE ALIAS
C) CREATE SEQUENCE
D) CREATE SYNONYM

4. What is required for the queries combined by a SET operator to work correctly?

A) The tables must be joined using a primary key.
B) Both queries must include the WHERE clause.
C) Both queries must use the GROUP BY clause.
D) The result sets must have the same number of columns and compatible data types.

5. What happens when the maximum value of a sequence is reached?

A) The sequence starts decrementing values.
B) The sequence resets to the starting value if the CYCLE option is specified.
C) The sequence stops generating values.
D) An error is raised, and the sequence must be recreated.

Solutions: