Learning Real-World Performance Skills from SQL & PostgreSQL Interview Experiences
I recently completed a series of interviews for engineering roles, and one key theme stood out: SQL and PostgreSQL aren’t just about writing queries — they’re about knowing how data systems work under pressure.
On my main blog, I broke down:
The exact SQL problems I was asked (recursive queries, windowing, multi-level filtering)
Advanced PostgreSQL internals, like execution plans, sharding design, and logical replication
Real discussions around performance bottlenecks, indexing decisions, and CDC strategies
🎯 Whether you’re prepping for a systems-heavy role or improving your Postgres stack, this walkthrough will help.