修改及查看mysql数据库的字符集

1、修改及查看mysql数据库的字符集Liunx下修改MySQL字符集:1.查找MySQL的cnf文件的位置find / -iname '*.cnf' -print/usr/share/mysql/my-innodb-heavy-4G.cnf/usr/share/mysql/my-f/usr/share/mysql/my-f/usr/share/mysql/my-f/usr/share/mysql/my-f/usr/share/texmf/web2c/f/usr/share/texmf/web2c/f/usr/share/texmf/web2c/f/usr/share/texmf/

2、tex/xmltex/f/usr/share/texmf/tex/jadetex/f/usr/share/doc/MySQL-server-community-5.1.22/my-innodb-heavy-4G.cnf/usr/share/doc/MySQL-server-community-5.1.22/my-f/usr/share/doc/MySQL-server-community-5.1.22/my-f/usr/share/doc/MySQL-server-community-5.1.22/my-f/usr/share/doc/MySQL-server-community-5.1.22

3、/my-f2. 拷贝f、my-f、my-f、my-innodb-heavy-4G.cnf其中的一个到/etc下,命名为fcp /usr/share/mysql/my-f /etc/f3. 修改fvi /etc/f在client下添加default-character-set=utf8在mysqld下添加default-character-set=utf84.重新启动MySQLrootbogon # /etc/rc.d/init.d/mysql restartShutting down MySQL 确定Starting MySQL. 确定rootbogon # mysql -u root -pE

4、nter password:Welcome to the MySQL monitor. Commands end with ; or g.Your MySQL connection id is 1Server version: 5.1.22-rc-community-log MySQL Community Edition (GPL Type 'help;' or 'h' for help. Type 'c' to clear the buffer.5.查看字符集设置mysql> show variables like 'collat

5、ion_%'+-+-+| Variable_name | Value |+-+-+| collation_connection | utf8_general_ci | collation_database | utf8_general_ci | collation_server | utf8_general_ci |+-+-+3 rows in set (0.02 secmysql> show variables like 'character_set_%'+-+-+| Variable_name | Value |+-+-+| character_set_cli

6、ent | 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 (0.02 secmysql>其他的一些

7、设置方法:修改数据库的字符集mysql>use mydbmysql>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.optdefault-character-set=latin1default-collation=latin1_swedish_ci为default-character-set=utf8default-collation=utf8_genera

8、l_ci重起MySQL:rootbogon # /etc/rc.d/init.d/mysql restart通过MySQL命令行修改:mysql> set character_set_client=utf8;Query OK, 0 rows affected (0.00 secmysql> set character_set_connection=utf8;Query OK, 0 rows affected (0.00 secmysql> set character_set_database=utf8;Query OK, 0 rows affected (0.00 secmy

9、sql> set character_set_results=utf8;Query OK, 0 rows affected (0.00 secmysql> set character_set_server=utf8;Query OK, 0 rows affected (0.00 secmysql> set character_set_system=utf8;Query OK, 0 rows affected (0.01 secmysql> set collation_connection=utf8;Query OK, 0 rows affected (0.01 secm

10、ysql> set collation_database=utf8;Query OK, 0 rows affected (0.01 secmysql> set collation_server=utf8;Query OK, 0 rows affected (0.01 sec查看:mysql> show variables like 'character_set_%'+-+-+| Variable_name | Value |+-+-+| character_set_client | utf8 | character_set_connection | utf8

11、| 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 (0.03 secmysql> show variables like 'collation_%'+-+-+| V

12、ariable_name | Value |+-+-+| collation_connection | utf8_general_ci | collation_database | utf8_general_ci | collation_server | utf8_general_ci |+-+-+3 rows in set (0.04 sec-【知识性文章转载】MYSQL 字符集问题MySQL的字符集支持(Character Set Support有两个方面:字符集(Character set和排序方式(Collation。对于字符集的支持细化到四个层次:服务器(server,数据库(dat

13、abase,数据表(table和连接(connection。1.MySQL默认字符集MySQL对于字符集的指定可以细化到一个数据库,一张表,一列,应该用什么字符集。但是,传统的程序在创建数据库和数据表时并没有使用那么复杂的配置,它们用的是默认的配置,那么,默认的配置从何而来呢? (1编译MySQL 时,指定了一个默认的字符集,这个字符集是latin1;(2安装MySQL 时,可以在配置文件(my.ini 中指定一个默认的的字符集,如果没指定,这个值继承自编译时指定的;(3启动mysqld 时,可以在命令行参数中指定一个默认的的字符集,如果没指定,这个值继承自配置文件中的配置,此时charact

14、er_set_server 被设定为这个默认的字符集;(4当创建一个新的数据库时,除非明确指定,这个数据库的字符集被缺省设定为character_set_server;(5当选定了一个数据库时,character_set_database 被设定为这个数据库默认的字符集;(6在这个数据库里创建一张表时,表默认的字符集被设定为character_set_database,也就是这个数据库默认的字符集;(7当在表内设置一栏时,除非明确指定,否则此栏缺省的字符集就是表默认的字符集;简单的总结一下,如果什么地方都不修改,那么所有的数据库的所有表的所有栏位的都用latin1 存储,不过我们如果安装MyS

15、QL,一般都会选择多语言支持,也就是说,安装程序会自动在配置文件中把default_character_set 设置为UTF-8,这保证了缺省情况下,所有的数据库的所有表的所有栏位的都用UTF-8 存储。2.查看默认字符集(默认情况下,mysql的字符集是latin1(ISO_8859_1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%'+-+-+| Variable_name | Value |+-+-+| character_set_client | latin1 | chara

16、cter_set_connection | latin1 | character_set_database | latin1 | character_set_filesystem | binary | character_set_results | latin1 | character_set_server | latin1 | character_set_system | utf8 | character_sets_dir | D:"mysql-5.0.37"share"charsets" |+-+-+mysql> SHOW VARIABLES

17、LIKE 'collation_%'+-+-+| Variable_name | Value |+-+-+| collation_connection | utf8_general_ci | collation_database | utf8_general_ci | collation_server | utf8_general_ci |+-+-+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 = utf8character_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+-+-+| Variable_name | Value |+-+-+| character_set_client | utf8 | character_set_connection | utf8 | character_set_database | utf8 | character_set_filesys