这不是一条 SQL 就搞定的事情吗？ 我曾经负责过的并发量蛮高的商品库存系统，核心扣减逻辑真的就是靠一条 SQL 搞定的。没有引入分布式锁（如 Redis Lock）或者消息队列。 核心思路其实就是数据库层面的乐观锁。利用 MySQL 的行锁特性 + UPDATE 语句的原子性，再配合 Java 中判断影响行数（Affected ...

Microsoft tested the “Create a table” feature with Windows Insiders in November 2025, and now it’s available for everyone on Windows 11. If you own a Copilot+ PC, you will also notice that Notepad can ...

Microsoft is keen to keep improving Windows 11, adding new features that make the system easier and more useful for everyday tasks. Some updates are small, while others significantly alter how people ...

Get started with Java streams, including how to create streams from Java collections, the mechanics of a stream pipeline, examples of functional programming with Java streams, and more. You can think ...

Abstract: The work presents some techniques using MySQL Workbench and Amazon AWS RDS service applied for creating and querying MySQL databases. In this context, it is shown a way to querying a DB ...

Community driven content discussing all aspects of software development from DevOps to design patterns. Sometimes it’s nice to format the output of a console based Java program in a friendly way. The ...

In this video, I demonstrate how to make three waterfall tables. The first is a simple version made from ash, the second features an epoxy river crafted from elm crotch, and the third incorporates a ...

As D2L only provides the ERD for the tables and no create templates, nor including the types and sizes via the API. Here are the MySQL Create statements for the tables. You may notices that each table ...

MySQL is one of the world’s most widely used database management systems. It is easy to install and use and is usually free. Here’s how to use it. In our previous post, we took you through the basic ...

Have you ever found yourself scrolling endlessly through a long document, desperately trying to locate a specific section? Or maybe you’ve spent hours manually formatting a table of contents, only to ...