如果数据库不支持 utf8mb4_0900_ai_ci,你可能需要升级 MySQL 版本。utf8mb4_0900_ai_ci 是在MySQL 8.0.4 及以上版本中引入的。因此,如果你使用的是较旧的 MySQL 版本,需要升级到支持该字符集的版本。 升级MySQL 版本的具体步骤因操作系统和安装方式而异,可以参考 MySQL 官方文档或相关教程进行。 如果升级数...
CodeIgniter Forums CodeIgniter 4 CodeIgniter 4 Support ERROR: DEFAULT CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci' at line 9 ERROR: DEFAULT CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci' at line 9ab-ci-2023Newbie Posts: 2 Threads: 1 Joined: Oct 2023 Reputation: ...
mysqld--character-set-server=utf8mb4--collation-server=utf8mb4_0900_ai_ci 修改my.cnf(Windows下是my.ini)文件 [mysqld]character-set-server=utf8mb4 重新编译:cmake . -DDEFAULT_CHARSET=latin1 -DDEFAULT_COLLATION=latin1_german1_ci(没用过) 动态修改:set names utf8mb4;(只对当前connect有效,...
The SQL being executed was: ALTER TABLE `craft_categorygroups` CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci' in /var/www/html/vendor/yiisoft/yii2/db/Schema.php:676 Error Info: Array ( [0] => 42000 [1] => 1071 [2] => Specified key was too long; max key lengt...
For applications that store data using the default MySQL character set and collation (utf8mb4,utf8mb4_0900_ai_ci), no special configuration should be needed. If applications require data storage using a different character set or collation, you can configure character set information several ways...
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci; -- 房间信息表 CREATE TABLE `room` ( `id` int(10) NOT NULL AUTO_INCREMENT COMMENT '房间表主键', `room_name` varchar(16) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '房间名称', ...
MySQL 8.0 默认的是 utf8mb4_0900_ai_ci,属于 utf8mb4_unicode_ci 中的一种,具体含义如下: uft8mb4 表示用 UTF-8 编码方案,每个字符最多占4个字节。 0900 指的是 Unicode 校对算法版本。(Unicode归类算法是用于比较符合Unicode标准要求的两个Unicode字符串的方法)。
For applications that store data using the default MySQL character set and collation (utf8mb4,utf8mb4_0900_ai_ci), no special configuration should be needed. If applications require data storage using a different character set or collation, you can configure character set information several ways...
修改后 = 'CREATE DATABASE IF NOT EXISTS database_name DEFAULT CHARSET utf8mb4 COLLATE utf8mb4_0900_ai_ci;'DEFAULT CHARSET utf8 COLLATE utf8_general_ci 是之前老版sql的写法。代码执行创建成功~(๑•̀ㅂ•́)و✧相关知识补充UTF8MB4与UTF8MB3的区别介绍:https://dev.mysql.com/d...
For applications that store data using the default MySQL character set and collation (utf8mb4, utf8mb4_0900_ai_ci), no special configuration should be needed. If applications require data storage using a different character set or collation, you can configure character set information several way...