Jun 14, 2026 in Programming, Data, Databases — SQL is the standard language for storing, querying and changing data in relational databases. Core commands (SELECT, INSERT, UPDATE, DELETE), how a query works, SQL vs NoSQL, and why it is still essential in 2026.
Jun 14, 2026 in Programming, Tools, Workflow — Git is a distributed version-control system that tracks every change to your code so you can branch, merge, collaborate and undo. Core concepts (commit, branch, merge, remote), the daily workflow, and how it differs from GitHub.
Jun 14, 2026 in Programming, Concepts — An algorithm is a finite, step-by-step procedure that turns input into output. Its key properties, everyday and code examples, why efficiency (Big-O) matters, and how it differs from a program.
Jun 14, 2026 in Programming, Web, Data — JSON is a lightweight, human-readable text format for structured data — the language most web APIs and config files speak. Its syntax, why it is everywhere, how it compares to XML, and its honest limits.
Jun 14, 2026 in Programming, Web, Concepts — An API is a contract that lets one piece of software talk to another. The main kinds (web/REST, library, OS), how a web request and response work, and why APIs are everywhere in modern software.