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 ...

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 ...

For fixing Windows errors, we recommend Fortect: Fortect will identify and deploy the correct fix for your Windows errors. Follow the 3 easy steps to get rid of ...

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 ...

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 ...

Create a report using charts: Select Insert > Recommended Charts, then choose the one you want to add to the report sheet. Create a report with pivot tables: Select Insert > PivotTable. Select the ...

Struggling with disorganized data in Excel can be incredibly frustrating. You have all the information you need, but without connections between tables, it’s like trying to solve a puzzle with missing ...

Posts from this topic will be added to your daily email digest and your homepage feed. The latest updates for Google Sheets include new buttons for to make your data look better and more organized ...