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I learned SQL in 15 minutes! Here's how

Learn SQL basics in just 15 minutes with this tutorial focused on using SQL with MySQL. Topics covered include: - What SQL is ...
Ars Technica

mysql: group by date and count

Obviously the limit is part of the problem. Since this is a 3-day period, and I want 4 keys from each day, 12 should work right? Nope, because the counts vary by day. I want to select the top 4 keys ...