Old Tang | Pseudo-full-stack tech player: writes code without going bald, manages projects without going crazy, delivers without staying up late. No formal tutorials here, only a "slacking-off" practical manual that cures system pain points. Focuses on Shell, SQL, Java, and delivery, turning complexity into simplicity and making efficiency fun.
This beginner-friendly tutorial covers MySQL installation on Windows, recommended GUI tools, and 30 essential SQL functions categorized into query, update, insert, and delete operations with clear syntax examples for immediate hands-on practice.
This article dissects three high-frequency Java/SpringBoot interview questions—String vs StringBuffer vs StringBuilder, @SpringBootApplication annotation internals, and @Component with @Autowired for MyBatis Mapper—revealing underlying mechanisms, performance trade-offs, common pitfalls, and correct usage patterns to deepen technical understanding beyond rote memorization.
This article explains cloud platforms as server supermarkets, categorizes cloud products, demonstrates how cloud platforms, containers, and Kubernetes collaborate for multi-server container clusters, and provides essential kubectl commands for cluster management, deployment, scaling, debugging, and configuration.
This tutorial introduces Docker containerization fundamentals, comparing containers versus virtual machines with a concrete server example, explaining core concepts like images and repositories, and providing a comprehensive cheat sheet of practical Docker commands for image management, container operations, log debugging, and production best practices.
A practical guide for implementation engineers on writing effective documentation during project preparation and bidding phases, covering the 5W2H framework for feasibility analysis, realistic bidding responses to avoid overpromising, and how early documentation reduces later implementation risks.
This article explains MySQL triggers, stored procedures, and user-defined functions using relatable analogies—a wallet for triggers, pre-made meals for procedures, and a custom calculator for functions—complete with syntax templates, practical code examples for automated data logging, batch revenue calculation, and tiered commission logic, plus a selection guide for choosing the right tool.
An experienced interviewer shares real Linux and SQL questions given to 5-year implementation engineer candidates, revealing wide skill gaps in basic commands like top, df, du, ps, netstat, find, and SQL joins, recursive queries, and data cleaning — with standard answers and troubleshooting workflows.
Designed for newcomers, this tutorial introduces 30 fundamental Linux commands spanning file navigation, creation, copying, permissions, user switching, disk and memory inspection, process management, log searching, archiving, and safe service deployment, complete with practical examples and critical safety warnings.
