#dbms

Modern Database Access: Prisma, Drizzle, and ORMs Explained

Where Does Application Data Live After a User Closes the App? Imagine you're using an e-commerce application. You create an account, add products to your cart, place an order, and close the app. The n

🚀 The Ultimate Sql Master Guide

1️⃣ What is SQL? (Foundation Strong Karo) SQL = Structured Query Language Used for: Storing data Retrieving data Managing data Controlling access Handling transactions SQL works with Relational Databases 2️⃣ How Relational Database Actually L...

Top DBMS Interview Questions and Answers (Beginner to Advanced)

Introduction A Database Management System (DBMS) is a crucial topic in computer science and software development interviews.Whether you're preparing for campus placements, backend roles, or software engineering interviews, understanding DBMS concepts...

🧯 PostgreSQL Production Incident: Understanding a Disk I/O Meltdown After a Holiday Backlog

This article documents a real-world PostgreSQL production incident.All business names, schemas, queries, IPs, and identifiers have been anonymized for confidentiality. 📌 System Overview OS: Ubuntu Server 24.04 LTS Database: PostgreSQL 16.x CPU:...

🚀 What is SPOF (Single Point of Failure)?

In system design, SPOF means: When one part of the system fails and the whole system stops working. In short: One problem → Entire app is down Good companies always try to remove SPOF so users don’t face downtime. 💻 Example: One Developer Doing Al...

Normalization