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Mysql字符集的修改及查看问题_MySQL

时间:2021-07-01 10:21:17 帮助过:51人阅读

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Mysql字符集的修改及查看问题

修改及查看mysql数据库的字符集

修改my.cnf

vi /etc/my.cnf

在[client]下添加

default-character-set=utf8

在[mysqld]下添加

default-character-set=utf8

5.查看字符集设置

mysql> show variables like 'collation_%';

mysql> show variables like 'character_set_%';

修改数据库的字符集

mysql>use mydb

mysql>alter database mydb character set utf-8;

创建数据库指定数据库的字符集

mysql>create database mydb character set utf-8;

通过配置文件修改:

修改/var/lib/mysql/mydb/db.opt

default-character-set=latin1

default-collation=latin1_swedish_ci

default-character-set=utf8

default-collation=utf8_general_ci

通过MySQL命令行修改:

mysql> set character_set_client=utf8;

mysql> set character_set_connection=utf8;

mysql> set character_set_database=utf8;

mysql> set character_set_results=utf8;

mysql> set character_set_server=utf8;

mysql> set character_set_system=utf8;

mysql> set collation_connection=utf8;

mysql> set collation_database=utf8;

mysql> set collation_server=utf8;

查看:

mysql> show variables like 'character_set_%';

mysql> show variables like 'collation_%';

通常,查看系统的字符集和排序方式的设定可以通过下面的两条命令:

mysql> SHOW VARIABLES LIKE 'character%';

mysql> SHOW VARIABLES LIKE 'collation_%';

3.修改默认字符集

(1) 最简单的修改方法,就是修改mysql的my.ini文件中的字符集键值,

如 default-character-set = utf8

character_set_server = utf8

修改完后,重启mysql的服务,service mysql restart

使用 mysql> SHOW VARIABLES LIKE 'character%';查看,发现数据库编码均已改成utf8

(2) 还有一种修改字符集的方法,就是使用mysql的命令

mysql> SET character_set_client = utf8 ;

mysql命令行修改字符编码

1、修改数据库字符编码

mysql> alter database mydb character set utf8 ;

2、创建数据库时,指定数据库的字符编码

mysql> create database mydb character set utf8 ;

3、查看mysql数据库的字符编码

mysql> show variables like 'character%'; //查询当前mysql数据库的所有属性的字符编码

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

| Variable_name | Value |

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

| character_set_client | latin1 |

| character_set_connection | latin1 |

| character_set_database | utf8 |

| character_set_filesystem | binary |

| character_set_results | latin1 |

| character_set_server | utf8 |

| character_set_system | utf8 |

| character_sets_dir | /usr/share/mysql/charsets/ |

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

4、修改mysql数据库的字符编码

mysql> set character_set_client=utf8 ;

mysql> set character_set_connection=utf8 ;

mysql> set character_set_database=utf8 ;

mysql> set character_set_database=utf8 ;

mysql> set character_set_results=utf8 ;

mysql> set character_set_server=utf8 ;

mysql> set character_set_system=utf8 ;

mysql> show variables like 'character%';

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

| 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/share/mysql/charsets/ |

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

8 rows in set (0.00 sec)

MySQL用Load Data local infile 导入部分数据后中文乱码

今天在两台MySQL服务器之间导数据,因为另一个MySQL服务器是测试用的,差一个月的数据,从现有MySQL服务器select到一个文件,具体语句是:

select * from news where ine_time>='2010-02-01' and ine_time <'2010-03-01' into outfile '/tmp/newsdata.sql';然后scp到另一个MySQL Server上导入到对应的表中,具体语句如下:

load data local infile '/home/lsanotes/newsdata.sql' into table news;然后刷新访问这台数据库的web页面,发现刚导进来的这一个月的数据都是乱码,而以前其它月份的则正常,用show create table news;查看发现两个服务器中的news表都是utf8,奇怪,把导出的数据转换成utf8,再导入问题仍旧。

后来在数据库中查看刚刚导进的这一个月的数据时,没有执行set names utf8;就可以正常查看中文而不乱码,而其它月份的必须先执行set names utf8;才能看中文而不乱码,但是当我执行过set names utf8;后再看刚刚导进的这一个月的数据却是乱码,看来导进来的数据并不是utf8格式。最后的解决方法是:

load data local infile '/home/lsanotes/newsdata.sql' into table news character set utf8;

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