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 ...

NOTE: Not all collection methods are supported on MySQL/MariaDB < 5.6 NOTE: It is recommended to set a max connection limit for the user to avoid overloading the server with monitoring scrapes under ...

Table to Markdown is a lightweight Chrome extension that converts HTML tables to Markdown format with a single click. Perfect for developers, technical writers, and anyone who works with Markdown ...

As avid puzzlers know full well, the humble jigsaw puzzle is a thing of beauty in multiple ways. Not only are jigsaws an absorbing time sink, but multiple studies have demonstrated they are good for ...

Boost your SQL interview readiness with these 35 carefully selected SQL Interview Questions and Answers. Includes real-world ...

Please Note: All times UK. Tables are subject to change. The BBC is not responsible for any changes that may be made. Copyright © 2026 BBC. The BBC is not ...