在 MySQL 的面试中有一类经典的面试题。比如：如何给正在线上运行的表执行 DDL 语句？ 回答这个问题，首先我们需要明确，执行 DDL 语句的时候，MySQL 会干什么？ 在 MySQL 5.6 之前，执行 DDL 语句的时候，会给表添加写锁，会阻塞该表其他所有的读写操作。这对 ...

An enchanting table can be crafted using 1 book, 2 diamonds, and 4 obsidian in Minecraft. To apply an enchantment on the tools, players must spend Lapis Lazuli and some XP points. Placing 15 ...

Abstract: Partial video copy detection (PVCD) aims to discover copy segments of query videos from a video database, which plays an important role in video copyright protection, filtering, tracking, ...

This guide provides instructions on how to set up and use MySQL with DBeaver. Before you start, you must create a connection in DBeaver and select MySQL. If you have ...

Minecraft can be overwhelming when you boot in and run around exploring the blocky world. But thankfully, the game has several easy-to-use tools that can give beginners an edge; one of them is the ...

A top Social Security Administration official turned whistleblower says members of the Trump administration’s Department of Government Efficiency (DOGE) uploaded hundreds of millions of Social ...

I'm the baby and kids gear writer, a mom to three and former teacher. The best water tables of 2025 are sturdy and entertaining. “Water tables offer an opportunity for young children to learn by ...

GameSpot may get a commission from retail offers. You've probably spotted the Minecraft smithing table recipe in your crafting table, but it's not obvious what it's used for, or whether it's even ...

Community driven content discussing all aspects of software development from DevOps to design patterns. If you plan to do database development with Java and MySQL, the first thing you’ll need to do is ...