The Quest Begins (The "Why") I was building a tiny rate‑limiter for a side‑project API. The idea was simple: every request writes a row with user_id and requested_at (a timestamp) into a rate_limit_log table, and before allowing the request we count how many rows exist for that user in the last ...
Source: [Dev.to](https://dev.to/timevolt/indexing-like-a-jedi-how-i-tamed-my-database-16p0)