mysql编写中文时变成问号解决方法

第一种：

建表时加charset utf8mb4：create database ya charset utf8mb4

第二种：

把编码改为可识别中文：
mysql> show variables like ‘%character%‘;
+--------------------------+----------------------------------------+
| Variable_name | Value |
+--------------------------+----------------------------------------+
| character_set_client | gbk |
| character_set_connection | gbk |
| character_set_database | utf8 |
| character_set_filesystem | utf8 |
| character_set_results | gbk |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | C:\mysql-5.6.45-winx64\share\charsets\ |
+--------------------------+----------------------------------------+

格式   set character_set_database=utf8;

第三种：更改配置文件my.in

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 
[mysqld]
# 设置mysql的安装目录 **后面的路径一定是安装sql的目录（自己电脑的）**
basedir=C:\mysql-5.6.45-winx64
# 设置mysql数据库的数据的存放目录，必须是data
datadir=C:\mysql-5.6.45-winx64\data
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
# mysql端口
port=3306
# 字符集
[mysqld]
character-set-server=utf8
collation-server=utf8_general_ci
[client]
default-character-set=utf8
[mysql]
default-character-set=utf8

原文地址：https://www.cnblogs.com/yangzhixue/p/11449525.html