旧版 Navicat 在处理 MySQL 8.0 的 caching_sha2_password 认证插件时，连接会直接报错 Authentication plugin 'caching_sha2_password' cannot be loaded ，此时必须在 Navicat 连接设置中勾选 “使用旧版认证协议” （Advanced → Authentication → Use old ...

3. MySQL建库脚本：从字符集到索引，每一行都是考点 山科大课程设计验收时必问：“为什么用utf8mb4而不utf8？ ”“为什么订单表主键不用自增ID？ ”——这些问题的答案必须体现在你的建库SQL里。

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