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

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

SELECT ______(*) FROM employees;

SUM

TOTAL

NUMBER

COUNT

2 / 20

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

SELECT DISTINCT department FROM students;

SELECT department FROM students;

SELECT ALL department FROM students;

SELECT UNIQUE department FROM students;

3 / 20

What does the COUNT() function do?

Counts the number of columns

Counts the number of distinct values

Counts the number of rows

Calculates the total of a numeric column

4 / 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;

5 / 20

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

REMOVE

DELETE

DROP

CLEAR

6 / 20

What does the HAVING clause do in Snowflake?

Sorts the result set

Limits the number of rows returned

Filters groups based on a condition

Specifies the join condition

7 / 20

Identify the error in the following SQL code:

SELECT name salary FROM employees;

Missing table alias

Incorrect table name

Missing comma between "name" and "salary"

Incorrect column name

8 / 20

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

INTERSECT

MERGE

JOIN

UNION

9 / 20

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

True

False

10 / 20

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

False

True

11 / 20

How do you remove duplicate records in the result set?

UNIQUE

GROUP BY

FILTER

DISTINCT

12 / 20

Which statement correctly retrieves all records from the "employees" table?

FETCH * FROM employees

RETRIEVE * FROM employees

SELECT * FROM employees

GET * FROM employees

13 / 20

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

MODIFY TABLE

ADD COLUMN

ALTER TABLE

CHANGE TABLE

14 / 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);

INCLUDE INTO

INSERT INTO

APPEND TO

ADD TO

15 / 20

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

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

EQUALS

MATCHES

16 / 20

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

SORT BY

FILTER BY

GROUP BY

ORDER BY

17 / 20

What does the LIKE operator do?

Compares exact matches

Joins two tables

Groups similar data

Searches for a specified pattern in a column

18 / 20

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

True

False

19 / 20

Identify the error in the following SQL code that selects employees hired after January 1, 2020:

SELECT * FROM employees WHERE hire_date > '2020-01-01';

No error

Missing semicolon

Incorrect column name

Incorrect date format

20 / 20

The DROP command removes specific rows from a table.

False

True

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.