Basic SQL Queries in Snowflake: Beginner-Level Quiz

SQL queries form the backbone of any database interaction, and Snowflake is no exception. Understanding how to write and execute basic SQL queries is crucial to Snowflake's data warehousing capabilities. This beginner-level quiz covers general concepts, practical applications, code completion, and true/false questions. Test your knowledge and ensure you have a solid foundation of SQL queries in Snowflake.

1 / 20

What does the COUNT() function do?

Counts the number of rows

Calculates the total of a numeric column

Counts the number of distinct values

Counts the number of columns

2 / 20

Which SQL command will add a new column "email" to the "employees" table?

INSERT COLUMN email INTO employees;

MODIFY TABLE employees ADD COLUMN email;

ALTER TABLE employees ADD COLUMN email VARCHAR(255);

ADD COLUMN email TO employees;

3 / 20

Which command is used to change data in an existing table?

UPDATE

ALTER

MODIFY

INSERT

4 / 20

What is the purpose of the GROUP BY clause?

To aggregate data based on one or more columns

To sort data

To filter data

To combine tables

5 / 20

What does the LIKE operator do?

Groups similar data

Compares exact matches

Searches for a specified pattern in a column

Joins two tables

6 / 20

Fill in the blank to find all employees whose name starts with 'A':

SELECT * FROM employees WHERE name _______ 'A%';

MATCHES

EQUALS

7 / 20

The SELECT statement can only retrieve data from one table at a time.

False

True

8 / 20

Which SQL command would you use to add a new employee with the name "John Doe" and a salary of 50000 to the "employees" table?

_________ employees (name, salary) VALUES ('John Doe', 50000);

APPEND TO

ADD TO

INSERT INTO

INCLUDE INTO

9 / 20

How do you remove duplicate records in the result set?

GROUP BY

DISTINCT

UNIQUE

FILTER

10 / 20

How do you retrieve the distinct departments from the "students" table?

SELECT UNIQUE department FROM students;

SELECT DISTINCT department FROM students;

SELECT ALL department FROM students;

SELECT department FROM students;

11 / 20

Which function is used to find the highest value in a column?

HIGHEST()

MAX()

TOTAL()

SUM

12 / 20

The UPDATE command is used to modify existing records in a table.

True

False

13 / 20

Which keyword is used to sort the result set in ascending or descending order?

ORDER BY

SORT BY

FILTER BY

GROUP BY

14 / 20

Which statement updates the "salary" column in the "employees" table for employees with the job title "Manager"?

UPDATE employees SET salary = salary + 1000 WHERE job_title = 'Manager';

MODIFY

ALTER

CHANGE

UPDATE

15 / 20

Identify the error in the following SQL code:

SELECT name salary FROM employees;

Incorrect table name

Missing table alias

Missing comma between "name" and "salary"

Incorrect column name

16 / 20

What is the purpose of the WHERE clause?

To join data

To group data

To filter data

To sort data

17 / 20

What does the SELECT statement do in Snowflake?

Updates data in a table

Retrieves data from a table

Inserts data into a table

Deletes data from a table

18 / 20

The UNION operator combines the results of two SQL queries without removing duplicates.

True

False

19 / 20

Which SQL clause is used to remove rows from a table?

DELETE

REMOVE

DROP

CLEAR

20 / 20

Which keyword is used to combine the results of two SQL queries?

INTERSECT

UNION

MERGE

JOIN

Your score is

The average score is 47%

This beginner-level quiz will test your knowledge of basic SQL queries in Snowflake. As a new user, this quiz will help you learn the fundamental SQL commands that make Snowflake a powerful cloud data platform.

Snowflake is unique in data warehousing because it manages structured and semi-structured data with unmatched adaptability and scalability. A solid understanding of SQL queries is required to utilize its capabilities fully.

Take this quiz if you want:

to test your knowledge of Snowflake’s essential SQL commands.
practical questions that mimic real-world situations.
to develop confidence and readiness for more advanced topics.

Good luck.