Woooo hooooo We’ve finished the second chapter, I’m so glad you’ve reached it here and I hope you feel so much power from your knowledge By now, we’ve not only covered how the data works in marketing, but also we’ve learned the two most fundamentals techniques in data analysis: grouping & counting and grouping & summing.
Let’s recap what we’ve learned in the 2nd chapter:
OR
Combination of OR
and AND
operators allows us to build powerful filters for our queries:
SELECT COUNT(*) FROM users WHERE (country = 'ca' OR country = 'gb') AND...