sql，ALTER DATABASE database_name CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;，`，，对于RDS for MySQL数据库修改authentication，可以使用以下命令：，，`sql，ALTER USER 'username'@'host' IDENTIFIED BY 'new_password';，``sql，ALTER DATABASE database_name CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;，`，，对于RDS for MySQL数据库修改authentication，可以使用以下命令：，，`sql，ALTER USER 'username'@'host' IDENTIFIED BY 'new_password';，``Powered By Z-BlogPHP 1.7.3