If you’ve ever hit “undo” in a game, you already get the heart of database transactions. Let’s make it click—simply, clearly, and with real SQL you can run. What is Transactions in SQL? A transaction is a small, safe “to-do list” for your database: a group of SQL statements that either all succeed together or […]

Imagine you ask a very smart robot, “What’s the tallest mountain in India, and what’s its height according to the latest survey?”If the robot only uses what it memorised long ago during training, it may not know about the latest survey. But with RAG (Retrieval-Augmented Generation), the robot first looks up the newest information and

If you’re learning SQL or preparing for a database interview, you’ve probably heard the term ACID properties. Sounds a bit technical, right? Don’t worry — in this article, we’ll break it down in simple, easy-to-understand language (just like your favorite teacher would explain). Let’s dive in. What Does ACID Mean in SQL? In SQL and

What is “Structured Concurrency”? Think of coroutines like kids on a school trip. Structured concurrency says: This makes your async code safe, traceable, and clean—no lost tasks, no hidden errors. The 3 golden rules Two must-know scopes 1) coroutineScope { … } (default, strict) 2) supervisorScope { … } (for independent tasks) launch vs async

Think of an AI (ChatGPT, Claude, etc.) as a smart student. It’s great at language, but it can’t see your files, call your APIs, or run company tools—unless you give it a safe, standard “plug.”Model Context Protocol (MCP) is that universal plug—the USB-C of AI apps—so any AI can talk to tools, data, and workflows

f you’re new to C# and LINQ, two interfaces cause big confusion: IEnumerable<T> and IQueryable<T>. This guide explains them like you’re brand-new, with simple code, clear rules, and SEO-friendly answers to “What is IQueryable vs IEnumerable,” “difference between them,” and “which is better.” Quick Summary What is IEnumerable<T>? Use it when: the data is already

If you’ve ever used Kotlin Coroutines in Android and thought “why isn’t my try/catch working?” — you’re not alone. Exception handling in coroutines can be surprisingly tricky. Many Android developers misuse launch, async, or CoroutineExceptionHandler, causing crashes, silent failures, or cancelled jobs that break their app in production. In this post, we’ll cover the 15

A View in SQL is a virtual table created from a SELECT query. It shows data from real tables without storing rows itself. Use it to simplify queries, protect sensitive columns, and standardize business logic. If you searched “update in ChatGPT5” or “what is view SQL”, this guide gives plain-English explanations plus copy-paste code. Key

A Bloom filter is a tiny, super-fast yes/no checker for membership: “Could this item be in my set?” What is a Bloom filter? (Beginner version) Imagine a long row of light switches (bits) all starting at 0 (off).To add an item (like a username), we run it through a few different hash functions (little math

If you’ve been learning SQL and came across the symbols @ and @@, you might have wondered: 1. What is @ and @@ in SQL?2. Are they the same?3. Which is better: @ or @@ in SQL? Let’s clear up all the confusion in a simple, teacher-style explanation — with easy examples you can try