🗃️

SQL & Database Interview Questions

90+ database interview questions covering SQL queries, NoSQL systems, and cutting-edge vector databases. Essential for any data-related role.

📊 90+ Questions ⏱️ ~20 hours of study 🏢 Asked at: Amazon, Google, Meta, Flipkart, Uber

💡 Study Tips for Databases

  • • Practice writing queries by hand — many interviews are on whiteboard/paper
  • • Master JOINs, Window Functions, and CTEs — these come up in 90% of interviews
  • • Understand query execution plans and indexing strategies
  • • Vector databases are increasingly asked in AI/ML interviews
  • • Know when to choose SQL vs NoSQL — this is a common system design question