We’re not far away from learning all possible SQL keywords. I hope you remember all steps of they execution by heart. Let’s go over them to make sure it’s the case:
FROM
is checked first, SQL engine will know from which table to read records first JOIN
goes second. The records from JOIN
tables are also read and joined with our main table 
WHERE
comes next – we filter the records from the final big table GROUP BY
splits final big table into smaller groups SELECT
is processed next, columns and results of all functions are calculated DISTINCT
...
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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. 