HSHarpreet Singh Kapulainsingh-technical-blog.hashnode.dev·1d ago · 10 min readYour JOIN Isn't Slow Because of Syntax. It's Slow Because of Memory.You've probably seen the meme — two people arguing over JOIN ... ON vs JOIN ... USING like one of them is obviously wrong. Here's the version that started this one: ❌ "The wrong one" SELE00
HSHarpreet Singh Kapulainsingh-technical-blog.hashnode.dev·21h ago · 8 min readWhat an Index Actually Is (Once You Stop Calling It a Book Index)You've heard the analogy. An index is like the index at the back of a book. Or a phone book, sorted by last name. Look up "Smith," flip to the right page, done. No index? You'd read the whole book co00
APArchana Prustyinarchana77.hashnode.dev·4d ago · 23 min read📘 SAP HANA Learning Series - Day 5In the previous notes, we understood how business data moves through SAP systems and how tables, keys, relationships, joins, and granularity are important for building accurate HANA models. Now we are00
APArchana Prustyinarchana77.hashnode.dev·Aug 29 · 26 min read📘 SAP HANA Learning Series - Day 3In the previous series, we understood the business process behind a real enterprise transaction. We started with a simple shop example and then moved to an enterprise example such as: Amazon purchase00
SMScott McMahaninaitransformeronline.hashnode.dev·Aug 18 · 2 min readHow to Create Video Documentation With AI ToolsVideo documentation helps users understand complex workflows by showing them exactly what to do. It can be especially valuable for software tutorials, product demonstrations, onboarding, troubleshooti00
RRajshreeinrjshree.hashnode.dev·Aug 16 · 8 min readThe Death of Prompt Engineering: Why Context Engineering Is the Real AI SkillA few years ago, one of the hottest skills in AI was Prompt Engineering. Entire courses, job descriptions, and tutorials appeared around the idea of writing the perfect prompt: "You are an expert sof00
EJEva J Patelinevapatel123.hashnode.dev·Aug 15 · 33 min readHow Gradient Descent Works: The Math Behind Machine LearningWhen you train a machine learning model, you might write something as simple as: model.fit(X, y) and suddenly your model can make predictions. But there's a big question hiding behind that one line: 10
SMScott McMahaninaitransformeronline.hashnode.dev·Aug 11 · 3 min readHow to Document AI Model BehaviorTraditional software documentation explains how a system is designed, configured, and used. AI documentation must go further because model outputs can vary as inputs, operating conditions, and data ch00
EJEva J Patelinevapatel123.hashnode.dev·Aug 8 · 9 min readBackpropagation: How Does AI Know What It Got Wrong? Explained in easy wordsYou give an AI a picture of a cat. It looks at the image and confidently says: “Dog.” Okay... interesting. But here’s the part that gets genuinely wild: How does the AI know what it needs to change? I10
Ttechpotionsintechpotions.hashnode.dev·Aug 6 · 6 min readHow to Create llms.txtOriginally published at techpotions.com. To answer how to create llms.txt directly: you write a plain Markdown file, place it at the root of your domain so it is reachable at https://yourdomain.com/ll10
