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

Counts the number of distinct values

Counts the number of columns

Calculates the total of a numeric column

2 / 20

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

DELETE

CLEAR

DROP

REMOVE

3 / 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);

ADD TO

INSERT INTO

APPEND TO

INCLUDE INTO

4 / 20

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

INSERT COLUMN email INTO employees;

ADD COLUMN email TO employees;

ALTER TABLE employees ADD COLUMN email VARCHAR(255);

MODIFY TABLE employees ADD COLUMN email;

5 / 20

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

SELECT department FROM students;

SELECT DISTINCT department FROM students;

SELECT ALL department FROM students;

SELECT UNIQUE department FROM students;

6 / 20

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

False

True

7 / 20

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

MAX()

TOTAL()

SUM

HIGHEST()

8 / 20

Identify the error in the following SQL code:

SELECT name salary FROM employees;

Incorrect column name

Missing comma between "name" and "salary"

Incorrect table name

Missing table alias

9 / 20

What is the purpose of the GROUP BY clause?

To aggregate data based on one or more columns

To filter data

To sort data

To combine tables

10 / 20

How do you remove duplicate records in the result set?

GROUP BY

UNIQUE

DISTINCT

FILTER

11 / 20

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

INTERSECT

UNION

MERGE

JOIN

12 / 20

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

True

False

13 / 20

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

True

False

14 / 20

How do you retrieve the names of employees who earn more than 60000 from the "employees" table?

SELECT name FROM employees WHERE salary > 60000

SELECT name FROM employees WHERE salary >= 60000

SELECT name FROM employees WHERE salary != 60000

SELECT name FROM employees WHERE salary < 60000

15 / 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';

CHANGE

MODIFY

UPDATE

ALTER

16 / 20

What does the HAVING clause do in Snowflake?

Limits the number of rows returned

Sorts the result set

Specifies the join condition

Filters groups based on a condition

17 / 20

What is the purpose of the WHERE clause?

To group data

To join data

To sort data

To filter data

18 / 20

How do you add a new column to an existing table?

MODIFY TABLE

ALTER TABLE

ADD COLUMN

CHANGE TABLE

19 / 20

Fill in the blank to get the total count of employees:

SELECT ______(*) FROM employees;

COUNT

NUMBER

TOTAL

SUM

20 / 20

What does the LIKE operator do?

Joins two tables

Compares exact matches

Searches for a specified pattern in a column

Groups similar data

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.