How Identical Are 'Identical Characters' in Japanese? Measuring MySQL and PostgreSQL Collations and Full-Width Character Handling to Create a Duplicate Insp…

When applying UNIQUE constraints to Japanese names or addresses, or matching them via JOIN, the database collation determines ...

[Database Edition 02] Why you should learn SQL in the AI era

When people who have just started learning programming or have just entered the IT industry ask me, "What should I study ...
Reuters

AMD joins $1 trillion club as chipmakers rally on AI-driven demand

AMD becomes fourth US chipmaker to top $1 trillion valuation AMD share price has nearly tripled this year Philadelphia chip index gains 2.7% to hit a one-month high Sept 21 (Reuters) - Advanced Micro ...
blog.csdn

MySQL表关联时联合索引最左匹配：连接列位置决定JOIN性能

1. 先给答案：表关联不是不需要最左匹配，而是要看“连接列的位置” 网上关于联合索引最左匹配原则的讨论，绝大多数都停留在单表查询，比如 WHERE a=1 AND b=2 能走 (a,b) 索引， WHERE b=2 就不能走。
Politico

Trump threatens to impose ‘serious tariffs’ on Europe if Canada joins EU as associate member

President Donald Trump pulled out one of his favorite words as he threatened retaliation if the European Union were to admit Canada as an associate member. Trump told reporters Wednesday that he might ...