SET CHARSET

SET {CHARSET  CHARACTER SET} {DEFAULT  charset_name};

obclient> SET CHARSET 'gbk';
Query OK, 0 rows affected (0.01 sec)

obclient> SHOW VARIABLES LIKE '%char%';
+--------------------------------------+---------+
 Variable_name                         Value   
+--------------------------------------+---------+
 character_set_client                  gbk     
 character_set_connection              utf8mb4 
 character_set_database                utf8mb4 
 character_set_filesystem              binary  
 character_set_results                 gbk     
 character_set_server                  utf8mb4 
 character_set_system                  utf8mb4 
 validate_password_special_char_count  0       
+--------------------------------------+---------+
8 rows in set (0.00 sec)