CentOS 下载 MySQL 储存表情

1. 登录数据库，查看 MySQL 数据库字符集：

   mysql> show VARIABLES like 'character%';
   +--------------------------+----------------------------+
   | Variable_name            | Value                      |
   +--------------------------+----------------------------+
   | character_set_client     | utf8                       |
   | character_set_connection | utf8                       |
   | character_set_database   | latin1                     |
   | character_set_filesystem | binary                     |
   | character_set_results    | utf8                       |
   | character_set_server     | latin1                     |
   | character_set_system     | utf8                       |
   | character_sets_dir       | /usr/share/mysql/charsets/ |
   +--------------------------+----------------------------+
   8 rows in set (0.01 sec)
   
   mysql> 
   

2. 停止数据库：

   systemctl stop mysqld
   

3. 修改字符集：

   vim /etc/my.cnf

   
   在最后新增：

   [mysql]
   default-character-set=utf8mb4
   [mysqld]
   character_set_server=utf8mb4
   collation_server=utf8mb4_general_ci
   

4. 启动数据库：

   systemctl start mysqld

5. 重新登录连接数据库，查看字符集：

   mysql> show VARIABLES like 'character%';
   +--------------------------+----------------------------+
   | Variable_name            | Value                      |
   +--------------------------+----------------------------+
   | character_set_client     | utf8mb4                    |
   | character_set_connection | utf8mb4                    |
   | character_set_database   | latin1                     |
   | character_set_filesystem | binary                     |
   | character_set_results    | utf8mb4                    |
   | character_set_server     | latin1                     |
   | character_set_system     | utf8                       |
   | character_sets_dir       | /usr/share/mysql/charsets/ |
   +--------------------------+----------------------------+
   8 rows in set (0.01 sec)
   
   mysql> 
   

6. 以后就可以使用 utf8mb4 储存表情了。