60. Order of SQL commands execution in a query

In the last lessons we learned GROUP BY statement. It is the foundation of data analysis with SQL. It allows us to group records and calculate aggregated values on them. Examples are numerous:

  • signups by country
  • signups by day
  • min/max/average age of users
  • min/max/average revenue per user/per county/per day etc

The real power comes when we start combining groups and look at our data from different angles. We’ll come to it in one of the next lessons.

You see how powerful GROUP BY is, this is why it’s important to get it right. Let’s recap the...

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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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