EasySQL challenge #84DISTINCT

Unique User Countries

List distinct countries of users.

The challenge runs on the SQLabHub practice database (SQLite) and uses the users table. You can solve it in the browser, with nothing to install.

Solve This SQL Challenge

The task

List distinct countries of users.

A correct answer returns 8 rows with one column: country.

Tables used in this challenge

`users` 150 rows

id INTEGER (PK) · first_name TEXT · last_name TEXT · email TEXT · phone TEXT · city TEXT · country TEXT · created_at TEXT · status TEXT · is_premium INTEGER

First 3 rows of the users table
id	first_name	last_name	email	phone	city	country	created_at	status
1	Jennifer	Torres	jennifer.torres57@icloud.com	+1-263-376-2371	Houston	Canada	2024-04-13	active
2	Donna	Adams	donna.adams52@gmail.com	+1-753-780-6670	Fort Worth	Canada	2020-09-15	inactive
3	Kenneth	Young	kenneth.young94@proton.me	+1-440-743-9503	Austin	USA	2023-09-05	active

The first rows of each table are shown. See how all the tables relate on the database schema page.

Expected output

Expected output of the challenge
country
Canada
USA
France
Germany
Australia
Brazil
UK
India

The complete result: 8 rows. This is the output of the model solution on the practice database. The task does not fix a sort order, so your rows may come back in a different order.

What you practise

Removing duplicate rows with DISTINCT

Hint and approach

Try the challenge first. Open these only when you need them.

Show the hint

Use DISTINCT

Show the step-by-step approach

How the model solution is built, in the order the database evaluates it:

Read from the users table.
Return only the column country.
DISTINCT removes duplicate rows, so each value appears once.

Model solution

Checking your session…

What to watch for

DISTINCT. DISTINCT works on the whole selected row. Adding one more column to the SELECT list can bring the duplicates back.