👨💻 Want to master SQL for Big Tech interviews?
This "Find Active Users" problem is just the beginning!
📈 Learn the patterns, not just the syntax.
🔗 Watch the full SQL prep playlist:
👉 https://www.youtube.com/playlist?list=PLlIjgXjvFQh0NWrgxu_fDD48KiFM5OM2i
💬 Drop a ✅ if you got it right, or comment your approach below!
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