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Oracle Database 23ai SQL Associate Sample Questions:

1. What is the purpose of the MERGE statement in SQL?

A) To delete duplicate rows from a table
B) To update existing rows or insert new rows in a target table
C) To join two tables into one
D) To combine the results of two queries

2. Which function is used to convert a string to uppercase in SQL?

A) CONVERT_UPPER
B) TO_UPPERCASE
C) CASE_UPPER
D) UPPER

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

4. Which of the following statements is true about constraints in Oracle Database?

A) Constraints cannot reference other tables.
B) Constraints can be added or modified using the ALTER TABLE statement.
C) Constraints can only be added when creating a table.
D) Constraints are automatically dropped when rows are deleted.

5. What happens if a privilege is revoked from a user who has granted the same privilege to others?

A) The privilege is retained by the other users.
B) The privilege is transferred to another user.
C) The privilege cannot be revoked in this scenario.
D) The privilege is revoked from all other users.

Solutions: