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Oracle Database 23ai SQL Associate Sample Questions:

1. What does the following SQL query do?
SELECT * FROM employees WHERE salary > 5000 ORDER BY department_id;

A) Retrieves all employees, sorted by department ID
B) Retrieves employees with salary less than 5000, sorted by department ID
C) Retrieves all employees with a salary greater than 5000, sorted by salary in ascending order
D) Retrieves all employees with a salary greater than 5000, sorted by department ID in ascending order

2. What will the following query do?
SELECT employee_id, salary
FROM employees
WHERE salary > (SELECT AVG(salary) FROM employees);

A) Return employees with a salary equal to the average salary
B) Return employees with a salary above the average salary
C) Return all employees and their salaries
D) Return employees with a salary below the average salary

3. Which command can be used to rename a table in Oracle Database?

A) MODIFY TABLE NAME
B) ALTER TABLE RENAME
C) RENAME
D) RENAME TABLE

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

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

5. Which of the following best describes a relational database?

A) A database where all data is stored as key-value pairs
B) A database that organizes data hierarchically
C) A flat file system with no defined relationships between data
D) A database that uses a tabular structure with rows and columns to represent relationships between data entities

Solutions: