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2026年2月3日，藤井正雄在psql中新增了转义符%i，用于显示连接服务器的热备状态。若服务器为热备模式，则显示为standby，反之则为primary。这一改进有助于数据库管理员快速识别数据库角色，提高工作效率。

休伯特·德佩兹·卢巴切夫斯基：等待 PostgreSQL 19 – psql：新增 %i 转义符以指示热备状态

Planet PostgreSQL ·

Laurenz Albe: Dealing with integer overflow in sequence-generated primary keys

Planet PostgreSQL ·

Unlock the secrets to reliable databases with primary and foreign keys! This beginner-friendly post uses engaging library metaphors and approachable SQL examples to show how keys keep your MySQL...

MySQL Basics: The Keys to the Kingdom—Primary and Foreign Keys Explained

Planet MySQL ·

剪切板管理工具clipcat推荐

Mephisto's blog ·

🎯 Spring中的`@Primary`与`@Qualifier` – 何时使用哪一个？

DEV Community ·

本文提出了一种基于EfficientNet的分层多粒度故障诊断模型，克服了核电系统中单一设备的局限性，能够有效分类不同电路和系统组件的故障，从而提升核电站的安全性。

Research on Fault Diagnosis of Nuclear Power Primary and Secondary Loops Based on Hierarchical Multi-Granularity Classification Network

BriefGPT - AI 论文速递 ·

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Anjhon’s Blog ·

C# 12的Primary Constructor可以更简单地声明空类型，对于record和空的class和struct都适用。示例代码展示了如何使用Primary Constructor来声明类型。使用;可以简化空类型体。文章提供了反编译结果和参考链接。

C# 12 Primary Constructor 的隐藏用法

dotNET跨平台 ·

主构造函数是在class或record的类声明中添加参数的方式。它可以用于初始化基类、成员字段或属性，以及简化依赖注入。派生类可以通过调用基类的主构造函数来初始化基类。主构造函数的参数是必须调用的构造函数的参数。

C#12中的Primary Constructors（主构造函数）

dotNET跨平台 ·

DigiCert旗下的数字证书品牌Thawte的根证书被吊销，导致部分软件无法正常加载。根证书已在Windows平台上吊销，苹果也更新了可信证书库。被吊销的证书为thawte Primary Root CA，签发时间为2006年，有效期至2036年。DigiCert和Thawte尚未公布吊销原因，可能是基础设施问题或私钥泄露。其他Thawte证书正常。

[后续] thawte Primary Root CA吊销状态刷新至全球所有系统均拦截

蓝点网 ·

Spring 中 @Primary 注解的原理是什么？

江南一点雨 ·

The Primary key is like the hero of a row, which has more beneficial features in the table while performing any task on the table. The DBA knows the importance of the primary key in the table...

Generate Invisible Primary Key (GIPK) MySQL 8.0

Planet MySQL ·

TODO 看懂原有 primary/detail 模板的跳转逻辑新建 snippet list fragment override fun onViewCreated(view: View, savedInstanceState: Bundle?) { val itemDetailFr...

Android Primary/Detail Flow 模板的 fragment 点击跳转逻辑

大象笔记 - Notes of Elephant Leg ·

Hey folks, This blog is straightforward but, at the same time, handy. At Percona, we know that the audience of our blogs is not limited to DBAs but includes a broader range of IT professionals,...

WHAT IF… The User Exists on the Replica and Not in the Primary? (Or Any Other Objects?)

Percona Database Performance Blog ·

Referential Integrity is a must when it comes to proper relational database design. The consistent usage of primary keys can help you ensure the best practices of RDBMS are adhered to. In this...

PostgreSQL Primary Key: CREATE and ALTER TABLE Statements

Devart Blog ·

The MySQL InnoDB storage engine lives off primary keys: Records are stored physically in a B+-Tree, a balanced tree where the data pages are the leaves of the primary key B-Tree. That implies that...

MySQL: GIPK (InnoDB and Primary Keys)

Planet MySQL ·

I have spent a lot of time on the primary schools choosing for my child. It is really a good result that I have generated a viz to show the details about all the information I found. Thanks for...