30 Oracle SQL Quiz Questions and Answers

Oracle SQL, also known as PL/SQL (Procedural Language/Structured Query Language), is a powerful and widely used database query language developed by Oracle Corporation. It is used to interact with Oracle Database, a leading relational database management system (RDBMS) used by organizations worldwide.

SQL stands for Structured Query Language, and it provides a standardized way to access, manipulate, and manage data in relational databases. Oracle SQL allows users to perform various operations, such as retrieving data, inserting new records, updating existing records, and deleting data from database tables.

Table of content

• Part 1: 30 Oracle SQL quiz questions & answers
• Part 2: Download Oracle SQL questions & answers for free
• Part 3: Free online quiz platform – OnlineExamMaker

Part 1: 30 Oracle SQL quiz questions & answers

1. What does SQL stand for?
a) Structured Query Language
b) Sequential Query Language
c) Standard Query Logic
d) Secondary Query Layer
Answer: a) Structured Query Language

2. Oracle SQL is used to interact with which type of database management system?
a) Microsoft SQL Server
b) MySQL
c) Oracle Database
d) PostgreSQL
Answer: c) Oracle Database

3. Which SQL statement is used to retrieve data from a database table?
a) FETCH
b) SELECT
c) GET
d) LOAD
Answer: b) SELECT

4. What is the purpose of the WHERE clause in an SQL query?
a) To specify the columns to retrieve
b) To sort the results
c) To filter rows based on conditions
d) To join multiple tables
Answer: c) To filter rows based on conditions

5. Which SQL statement is used to add new records to a database table?
a) UPDATE
b) ADD
c) INSERT
d) MODIFY
Answer: c) INSERT

6. What is the primary purpose of the ORDER BY clause in an SQL query?
a) To filter rows based on conditions
b) To specify the columns to retrieve
c) To join multiple tables
d) To sort the results
Answer: d) To sort the results

7. Which SQL function is used to count the number of rows in a table?
a) SUM
b) AVG
c) COUNT
d) MAX
Answer: c) COUNT

8. What is the purpose of the GROUP BY clause in an SQL query?
a) To join multiple tables
b) To filter rows based on conditions
c) To specify the columns to retrieve
d) To group rows based on a column’s values
Answer: d) To group rows based on a column’s values

9. Which SQL statement is used to update existing records in a database table?
a) INSERT
b) ADD
c) UPDATE
d) MODIFY
Answer: c) UPDATE

10. What is the purpose of the HAVING clause in an SQL query?
a) To filter rows based on conditions
b) To specify the columns to retrieve
c) To join multiple tables
d) To filter groups based on aggregate values
Answer: d) To filter groups based on aggregate values

11. Which SQL statement is used to remove records from a database table?
a) REMOVE
b) DELETE
c) ERASE
d) DROP
Answer: b) DELETE

12. What is the purpose of the JOIN clause in an SQL query?
a) To specify the columns to retrieve
b) To join multiple tables
c) To filter rows based on conditions
d) To sort the results
Answer: b) To join multiple tables

13. Which SQL function is used to find the highest value in a column?
a) MAX
b) MIN
c) SUM
d) AVG
Answer: a) MAX

14. What is the purpose of the DISTINCT keyword in an SQL query?
a) To filter rows based on conditions
b) To retrieve all columns from a table
c) To join multiple tables
d) To remove duplicate rows from the result set
Answer: d) To remove duplicate rows from the result set

15. Which SQL statement is used to create a new database table?
a) ADD TABLE
b) CREATE TABLE
c) NEW TABLE
d) MAKE TABLE
Answer: b) CREATE TABLE

Part 2: Download Oracle SQL questions & answers for free

16. What is the purpose of the BETWEEN operator in an SQL query?
a) To check if a value is NULL
b) To check if a value exists in a list
c) To check if a value is within a range
d) To check if a value matches a pattern
Answer: c) To check if a value is within a range

17. Which SQL function is used to find the average value in a column?
a) AVG
b) SUM
c) MAX
d) COUNT
Answer: a) AVG

18. What is the purpose of the UNION operator in an SQL query?
a) To combine the results of two or more SELECT statements
b) To sort the results
c) To filter rows based on conditions
d) To join multiple tables
Answer: a) To combine the results of two or more SELECT statements

19. Which SQL statement is used to modify the structure of an existing database table?
a) CHANGE TABLE
b) ALTER TABLE
c) MODIFY TABLE
d) UPDATE TABLE
Answer: b) ALTER TABLE

20. What is the purpose of the LIKE operator in an SQL query?
a) To check if a value is NULL
b) To check if a value exists in a list
c) To check if a value matches a pattern
d) To check if a value is within a range
Answer: c) To check if a value matches a pattern

21. Which SQL function is used to find the lowest value in a column?
a) MIN
b) MAX
c) SUM
d) AVG
Answer: a) MIN

22. What is the purpose of the IS NULL operator in an SQL query?
a) To check if a value is NULL
b) To check if a value exists in a list
c) To check if a value matches a pattern
d) To check if a value is within a range
Answer: a) To check if a value is NULL

23. Which SQL statement is used to delete an entire database table?
a) ERASE TABLE
b) DROP TABLE
c) REMOVE TABLE
d) DELETE TABLE
Answer: b) DROP TABLE

24. What is the purpose of the ORDER BY clause in an SQL query?
a) To filter rows based on conditions
b) To specify the columns to retrieve
c) To join multiple tables
d) To sort the results
Answer: d) To sort the results

25. Which SQL statement is used to remove duplicate rows from a result set?
a) DELETE
b) DISTINCT
c) GROUP BY
d) UNIQUE
Answer: b) DISTINCT

26. What is the purpose of the COMMIT statement in Oracle SQL?
a) To create a new table
b) To delete records from a table
c) To make changes permanent in the database
d) To update existing records in a table
Answer: c) To make changes permanent in the database

27. Which SQL clause is used to specify conditions for filtering rows in a SELECT statement?
a) FROM
b) WHERE
c) HAVING
d) GROUP BY
Answer: b) WHERE

28. What is the purpose of the ROLLBACK statement in Oracle SQL?
a) To undo all the changes made in the current transaction
b) To retrieve data from a database table
c) To create a new database table
d) To modify the structure of an existing database table
Answer: a) To undo all the changes made in the current transaction

29. Which SQL function is used to find the total sum of values in a column?
a) AVG
b) COUNT
c) SUM
d) MAX
Answer: c) SUM

30. What is the purpose of the ORDER BY clause in an SQL query?
a) To filter rows based on conditions
b) To specify the columns to retrieve
c) To join multiple tables
d) To sort the results
Answer: d) To sort the results

Part 3: Free online quiz maker – OnlineExamMaker

OnlineExamMaker is a powerful and user-friendly software tool that allows educators, trainers, and businesses to create interactive online quizzes and assessments. With OnlineExamMaker quiz software, you can easily design and distribute quizzes to evaluate knowledge, gather feedback, and measure performance.