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26 uniquely designed questions just for you to evaluate your skills in Basics of SQL quiz. Are you ready to challenge yourself and explore more? Let's get started and see how much you can score out of 26.

This quiz covers fundamental SQL concepts and questions, including queries, joins, aggregate functions, and data manipulation. Test your knowledge of SQL basics and improve your database management skills with these questions designed for beginners and intermediate users.

Please feel free to report any corrections if you come across any inaccuracies or errors. Your feedback is valuable in maintaining the accuracy of our content.

Questions

1. What does SQL stand for?
Answer: Structured Query Language
Explanation: SQL stands for Structured Query Language; which is used for managing and manipulating relational databases.Report for correction
2. Which SQL command is used to retrieve data from a database?
Answer: SELECT
Explanation: The SELECT command is used to retrieve data from a database table.Report for correction
3. What SQL clause is used to filter rows in a SELECT statement?
Answer: WHERE
Explanation: The WHERE clause is used to filter rows in a SELECT statement based on a specified condition.Report for correction
4. Which SQL statement is used to insert data into a table?
Answer: INSERT INTO
Explanation: The INSERT INTO statement is used to insert data into a table.Report for correction
5. What is the purpose of the SQL ORDER BY clause?
Answer: To sort the result set of a SELECT statement
Explanation: The ORDER BY clause is used to sort the rows in the result set of a SELECT statement based on specified columns.Report for correction
6. Which SQL command is used to update data in a table?
Answer: UPDATE
Explanation: The UPDATE command is used to modify existing data in a table.Report for correction
7. What SQL clause is used to group rows in a SELECT statement?
Answer: GROUP BY
Explanation: The GROUP BY clause is used to group rows in a SELECT statement based on specified columns.Report for correction
8. Which SQL statement is used to delete data from a table?
Answer: DELETE
Explanation: The DELETE statement is used to remove data from a table.Report for correction
9. What is the purpose of the SQL DISTINCT keyword?
Answer: To retrieve unique values from a column
Explanation: The DISTINCT keyword is used to retrieve unique values from a specified column in a SELECT statement.Report for correction
10. Which SQL clause is used to combine rows from two or more tables?
Answer: JOIN
Explanation: The JOIN clause is used to combine rows from two or more tables based on a related column.Report for correction
11. What is the purpose of the SQL HAVING clause?
Answer: To filter grouped rows in a SELECT statement
Explanation: The HAVING clause is used to filter the grouped rows in a SELECT statement based on a condition.Report for correction
12. Which SQL command is used to create a new table?
Answer: CREATE TABLE
Explanation: The CREATE TABLE command is used to create a new table in a database.Report for correction
13. What SQL function is used to count the number of rows in a table?
COUNT

COUNT

Answer: COUNT
Explanation: The COUNT function is used to count the number of rows in a table or the number of values in a specified column.Report for correction
14. Which SQL function is used to find the average value of a numeric column?
Answer: AVG
Explanation: The AVG function is used to calculate the average value of a numeric column in a table.Report for correction
15. What SQL clause is used to limit the number of rows returned by a SELECT statement?
Answer: LIMIT
Explanation: The LIMIT clause is used to restrict the number of rows returned by a SELECT statement in databases like MySQL and PostgreSQL.Report for correction
16. Which SQL command is used to add a new column to an existing table?
Answer: ALTER TABLE ADD COLUMN
Explanation: The ALTER TABLE ADD COLUMN command is used to add a new column to an existing table.Report for correction
17. What is the purpose of the SQL LIKE operator?
Answer: To filter rows based on a specified pattern
Explanation: The LIKE operator is used to filter rows based on a specified pattern in a SELECT statement.Report for correction
18. Which SQL function is used to find the highest value in a column?
Answer: MAX
Explanation: The MAX function is used to find the highest value in a column.Report for correction
19. What SQL command is used to delete a table from a database?
Answer: DROP
Explanation: The DROP command is used to delete a table from a database.Report for correction
20. Which SQL operator is used to combine multiple conditions in a WHERE clause?
Answer: AND
Explanation: The AND operator is used to combine multiple conditions in a WHERE clause.Report for correction
21. What SQL statement is used to change existing data in a table?
Answer: UPDATE
Explanation: The UPDATE statement is used to change or modify existing data in a table.Report for correction
22. Which SQL function is used to find the lowest value in a column?
Answer: MIN
Explanation: The MIN function is used to find the lowest value in a column.Report for correction
23. What SQL command is used to change the structure of an existing table?
Answer: ALTER TABLE
Explanation: The ALTER TABLE command is used to change the structure of an existing table; such as adding or modifying columns.Report for correction
24. Which SQL function is used to find the sum of values in a numeric column?
Answer: SUM
Explanation: The SUM function is used to calculate the sum of values in a numeric column.Report for correction
25. What SQL operator is used to negate a condition in a WHERE clause?
Answer: NOT
Explanation: The NOT operator is used to negate a condition in a WHERE clause; reversing its logical outcome.Report for correction
26. Which of the following is not a NoSQL database?
Answer: MySQL
Explanation: MySQL is a Relational database management system (RDBMS) that uses SQL, making it a traditional SQL database.Report for correction