Database Fundamentals in 9 Minutes (Disk, Pages, Indexing)

Ever wondered why databases store data on disk instead of memory, even though memory is much faster? 🤔 Or why some queries take forever while others are lightning fast? In this video, we break down *database fundamentals* in a simple and intuitive way: 📌 Why databases use disk instead of RAM 📌 How data is stored internally using pages 📌 Why queries become slow (full table scans explained) 📌 How indexing dramatically improves performance If you're a developer, student, or preparing for system design interviews, this video will give you a solid foundation of how databases actually work under the hood. 🚀 By the end, you'll understand: Why your queries are slow How databases retrieve data How to optimize performance using indexing 👍 Don’t forget to like, share, and subscribe for more deep dives into system design and backend engineering! ⏱️ Timestamps: 00:22 — Where data is stored? 02:08 — How data is stored? 05:17 — Why data retrieval is slow? 07:31 — Why index? #Database #SystemDesign #Indexing #BackendDevelopment #SQL #Programming