To query a user's mobile phone and WeChat number, the following SQL statement can be used.

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Overview Curated list of PHP books for beginners and experts in 2025.Covers foundational skills, PHP 8 features, MySQL, and web development.Hands-on examples an ...

Michael "Monty" Widenius, who co-authored the original MySQL in the 1990s, posted that he was "Heartbroken to hear about the ...

全表扫描（Full Table Scan）是数据库查询中常见的性能杀手，尤其在数据量巨大的生产环境中，一条效率低下的 SQL 就足以引发连锁性的系统故障。为从根本上防范此类风险， 百度 智能云数据库在 MySQL 内核层面设计并实现了一套全表扫描动态管控机制，实现对低效 SQL 的实时检测、灵活拦截与预警记录，将运维控制权真正交到开发者以及 DBA 手中。