mysql 修改字符集

查看mysql數據編碼

登錄MySQL服務，查看mysql數據庫默認的編碼

mysql> show variables like 'character%'; +--------------------------+-------------------------------------------------+ | Variable_name | Value | +--------------------------+-------------------------------------------------+ | character_set_client | gbk | | character_set_connection | gbk | | character_set_database | latin1 | | character_set_filesystem | binary | | character_set_results | gbk | | character_set_server | latin1 | | character_set_system | utf8 | | character_sets_dir | E:\0Develop\mysql-5.7.15-winx64\share\charsets\ | +--------------------------+-------------------------------------------------+ 8 rows in set, 1 warning (0.00 sec) mysql>

可以看出database和server都采用了latin1編碼，不支持中文，我們需要把它修改為utf-8。

除了這兩個，其它的如下

| 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 | E:\0Develop\mysql-5.7.15-winx64\share\charsets\ 

設置mysql數據庫編碼

在mysql安裝目錄下，將 my-default.ini 復制一分保存為 my.ini 
做如下修改 

主要看紅色框里的內容

[mysqld]
character-set-server=utf8 collation-server=utf8_general_ci [mysql] default-character-set = utf8 [mysql.server] default-character-set = utf8 [mysqld_safe] default-character-set = utf8 [client] default-character-set = utf8 

然后刪除你當前的mysql服務，再重新注冊mysql服務 
注：一定要以管理員的權限運行dos命令，且cd到mysql安裝目錄下的bin目錄，再注冊mysql服務

C:\Windows\system32>sc delete mysql [SC] DeleteService 成功 C:\Windows\system32>e: cd E:\>cd E:\0Develop\mysql-5.7.15-winx64\bin E:\0Develop\mysql-5.7.15-winx64\bin>mysqld --install mysql --defaults-file="E:\0Develop\mysql-5.7.15-winx64\my.ini" The service already exists! The current server installed: E:\0Develop\mysql-5.7.15-winx64\bin\mysqld MySQL E:\0Develop\mysql-5.7.15-winx64\bin>net stop mysql MySQL 服務正在停止..服務名無效。 請鍵入 NET HELPMSG 2185 以獲得更多的幫助。 E:\0Develop\mysql-5.7.15-winx64\bin>mysqld --install mysql --defaults-file="E:\0Develop\mysql-5.7.15-winx64\my.ini" Service successfully installed. E:\0Develop\mysql-5.7.15-winx64\bin>

結果

啟動服務，查看編碼

C:\Windows\System32>net start mysql
mysql 服務正在啟動 .
mysql 服務已經啟動成功。


C:\Windows\System32>mysql -u root
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.15 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. 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 | E:\0Develop\mysql-5.7.15-winx64\share\charsets\ | +--------------------------+-------------------------------------------------+ 8 rows in set, 1 warning (0.00 sec) mysql>

 

數據庫實例編碼設置

mysql> show create database test; +----------+-----------------------------------------------------------------+ | Database | Create Database | +----------+-----------------------------------------------------------------+ | test | CREATE DATABASE `test` /*!40100 DEFAULT CHARACTER SET latin1 */ | +----------+-----------------------------------------------------------------+ 1 row in set (0.00 sec) mysql> alter database test default character set utf8; Query OK, 1 row affected (0.00 sec) mysql> show create database test; +----------+---------------------------------------------------------------+ | Database | Create Database | +----------+---------------------------------------------------------------+ | test | CREATE DATABASE `test` /*!40100 DEFAULT CHARACTER SET utf8 */ | +----------+---------------------------------------------------------------+ 1 row in set (0.00 sec) mysql>

//查看MySQL數據庫服務器和數據庫字符集 show variables like '%char%';

//查看表的字符集 show table status from mysql_db like '%tb_name%'

//查看表中所有列的字符集 show full columns from tb_name;

//查看mysql所支持的字符集 show charset;

 

==修改字符集==

 

//修改全局字符集

set character_set_connection=gb2312;

set character_set_database=gb2312;

set character_set_results=gb2312;

set character_set_server=gb2312;

set character_set_system=gb2312;

set collation_connection=gb2312;

set collation_database=gb2312;

set collation_server=gb2312;

 

//修改表的字符集 ALTER TABLE tb_name CONVERT TO CHARACTER SET gb2312;

 

//修改字段字符集 alter table tb_name modify column tb_column varchar(30) character set gb2312 not null;