mysql更改utf8编码方式

方法1:

一、查看数据库编码格式

1	`mysql> show variables` `like` `'character_set_database';`

二、查看数据表的编码格式

1	`mysql> show` `create` `table` `<表名>;`

三、创建数据库时指定数据库的字符集

1	`mysql>create` `database` `<数据库名>` `character` `set` `utf8;`

四、创建数据表时指定数据表的编码格式

create table tb_books (

name varchar(45) not null,

price double not null,

bookCount int not null,

author varchar(45) not null ) default charset = utf8;

五、修改数据库的编码格式

1	`mysql>alter` `database` `<数据库名>` `character` `set` `utf8;`

六、修改数据表格编码格式

1	`mysql>alter` `table` `<表名>` `character` `set` `utf8;`

七、修改字段编码格式

mysql>alter table <表名> change <字段名> <字段名> <类型> character set utf8;

mysql>alter table user change username username varchar(20) character set utf8 not null;

方法2:

更改配置文件，mac系统下：

1	sudo vi /etc/my.cnf

编辑，加入：

[client]

default-character-set=utf8

[mysql]

default-character-set=utf8

[mysqld]

character-set-server=utf8

即：

这里特别要注意[mysqld]标签下一定要是character-set-server=utf8，不然mysql无法启动

show variables like 'character_set_%';

+--------------------------+-----------------------------------------------------------+

| 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/local/mysql-5.7.17-macos10.12-x86_64/share/charsets/ |

+--------------------------+-----------------------------------------------------------+

show variables like 'character_set_%';

+--------------------------+-----------------------------------------------------------+

| Variable_name | Value |

+--------------------------+-----------------------------------------------------------+

| character_set_client | utf8 |

| character_set_connection | utf8 |

| character_set_database | utf8 |

| character_set_filesystem | binary |

| character_set_results | utf8 |

| character_set_server | utf8 |

| character_set_system | utf8 |

| character_sets_dir | /usr/local/mysql-5.7.17-macos10.12-x86_64/share/charsets/ |

+--------------------------+-----------------------------------------------------------+

　　前后对比，更改成功

用pycharm连接mysql数据库时，要注意添加 charset="utf8"，即：

cnx = pymysql.connect(user="root",passwd="root",host="localhost",db="db_name",charset="utf8")

不然中文无法导入数据库

----清空数据表

truncate table tenement_message;

-----查找mysql文件夹

which mysql

巴特西

mysql更改utf8编码方式

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