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News
Whose Memory Is It? Building Multi-Tenant, Multi-Tier Memory for AI Agents (Part 4) | HackerNoon
3+ hour, 58+ min ago (1782+ words) This is a 4-part series on how agents remember:building short-, medium- and long-term memory thatscales across users, agents, and kubernetes clusters. Alice and Bob both use our agent platform. On Monday, Alice worked on a support incident, and the…...
NO idea where to start learning SQL?
3+ hour, 26+ min ago (246+ words) This article is a beginner friendly guide that gets you started into learning SQL as a programming... Tagged with programming, productivity, beginners, webdev....
Mainframe Migration Tools: What Works and What Fails
4+ hour, 58+ min ago (1485+ words) This guide describes the categories of tooling that actually exist, what each one genuinely does well, and the specific places where each tends to fail on real workloads. It is written for the people who have to sign the business…...
Data Substrate Versus Vector Db Rag
7+ hour, 57+ min ago (1246+ words) This week’s headlines highlight the rapid evolution of AI in China, with models like Qwen and DeepSeek pushing the frontier of capability. But as these models grow more sophisticated, the conversation around how data is stored, queried, and used as…...
Your primary key shouldn't be in the URL
9+ hour, 52+ min ago (169+ words) A sequential integer primary key is a great internal identifier: compact, fast to index, naturally ordered. It is a poor external one, for three reasons: The fix is to stop making one column serve two audiences: Every lookup still has…...
Why Is Redis So Fast? Understanding the In-Memory Database
6+ hour, 29+ min ago (27+ words) Redis can deliver extremely low-latency reads and writes. Here’s how in-memory storage, persistence, data structures, and its mostly …...
Window Functions in PySpark: A Practical Guide with ROW_NUMBER, RANK, LAG, LEAD, and Running Totals
6+ hour, 54+ min ago (104+ words) Non member readers can read it here for free If you work with Apache Spark, PySpark, Databricks, or SQL, sooner or later you will encounter a problem that looks deceptively simple: “For every customer, find their latest transaction.” “Calculate the…...
LeetCode Problem Statements Be Testing My English More Than SQL
12+ hour, 12+ min ago (257+ words) Currently, I am solving SQL problems on LeetCode, and believe me, the wording quality of some problems, especially the premium ones, is so poor. After spending the worst 15 minutes trying to understand the question, I finally realise that the problem…...
Vector Store: How Similarity Becomes Something You Can Actually Search
14+ hour, 45+ min ago (290+ words) A beginner’s guide to how vector stores make embeddings searchable while preserving their connection to the passages and …...
When a Zero-Parameter Cache Overtakes a Transformer
19+ hour, 58+ min ago (574+ words) The question this series exists to answer, put in a form that can be measured: a transformer sees a fixed 64-token window, a count table over the current document sees the whole document, and as documents get longer, how much…...