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🔥 DAILY INTERVIEW FLASHCARD
Topic: SQL & Databases 💾
Q: What is the primary difference between RANK() and DENSE_RANK() in window queries?
💡 Answer Preview:
RANK() leaves gaps when duplicate values occur (e.g. 1, 2, 2, 4), whereas DENSE_RANK() does not leave gaps (e.g. 1, 2, 2, 3). In my experience optimizing high-traffic e-commerce checkout ranks...
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💡 Sarah's Recruiter Takeaway:
"When I ask this in interviews, I look for candidates who don't just state the syntax difference, but show practical understanding. Mentioning how RANK() was used in a specific leaderboard layout project to handle identical tie scores demonstrates immediate senior capability."