48. Counting signups from English speaking countries

In the previous lesson we learned about OR operator and operator precedence and how to control it with parentheses:

SELECT COUNT(*) FROM users WHERE (country = 'ca' OR country = 'gb' OR country = 'au' OR country = 'us') AND signup_date BETWEEN '2018-02-01' AND '2018-02-07' 

How do you like it? 🤔 It often helps to ask the question “Can we do better?”. We clearly have room for improvement, as this query grew really big.

The OR operator did a great job and if you need to apply filters for different columns it’s the only way to go. Since we’re...

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Anatoli Makarevich, author of SQL Habit About SQL Habit

Hi, it’s Anatoli, the author of SQL Habit. 👋

SQL Habit is a course (or, as some of the students say, “business simulator”). It’s based on a story of a fictional startup called Bindle. You’ll play a role of their Data Analyst 📊 and solve real-life challenges from Business, Marketing, and Product Management.

SQL Habit course is made of bite-sized lessons (you’re looking at one atm) and exercises. They always have a real-life setting and detailed explanations. You can immediately apply everything you’ve learned at work. 🚀

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-- Type your query here, for example this one -- lists all records from users table: SELECT * FROM users
LIMIT 500
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