sql, SHOW VARIABLES LIKE 'character_set%';,
`,,2. **设置服务器级别的默认字符集**:, 编辑MySQL配置文件(如
my.cnf),添加或修改以下行:,
`ini, [mysqld], character-set-server=utf8mb4, collation-server=utf8mb4_general_ci,
`, 然后重启MySQL服务。,,3. **设置数据库的默认字符集**:,
`sql, ALTER DATABASE dbname CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci;,
`,,4. **设置表和列的字符集**:,
`sql, ALTER TABLE tablename CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;, ALTER TABLE tablename MODIFY columnname VARCHAR(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;,
`,,5. **验证更改**:,
`sql, SHOW FULL COLUMNS FROM tablename;,
``,,通过以上步骤即可在MySQL 8.0中修改字符编码格式。/etc/sysconfig/network-scripts/
目录下的配置文件,如 ifcfg-eth0,配置 IP 地址、子网掩码、网关等信息,然后使用 service network restart
命令重启网络服务。USE 数据库名;
。要进入名为 mydatabase
的数据库,只需在MySQL命令行中输入 USE mydatabase;
即可。Powered By Z-BlogPHP 1.7.3