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
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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.