mysql中utf8字符集的设置及character_set_database属性修改

 

 

 

mariadb配置文件修改字符集：

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# Disabling symbolic-links is recommended to prevent assorted security risks
 symbolic-links=0
# # Settings user and group are ignored when systemd is used.
# # If you need to run mysqld under a different user or group,
# # customize your systemd unit file for mariadb according to the
# # instructions in http://fedoraproject.org/wiki/Systemd
#
default-storage-engine = INNODB              #定义存储引擎
character-set-server = utf8                  #设置字符集为utf8
collation-server = utf8_general_ci           #设置字符集的检对规则

[client]
default-character-set=utf8

 [mysqld_safe]
 log-error=/var/log/mariadb/mariadb.log
 pid-file=/var/run/mariadb/mariadb.pid
#
# #
# # include all files from the config directory
# ##
 !includedir /etc/my.cnf.d

 

新安装MYSQL，还没有修改数据库系统编码。

之后由于创建数据库时候：create database db_name; 没有指定编码，之后发现乱码就修改各个属性之后还是乱码，便开始配置数据库属性，之后信息如下：

+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | latin1                       |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+

发现character_set_database该属性设置utf8之后依旧还是Latin1 ，其实这个属性是数据库属性，在创建数据库时候如果不指定默认就是这个，因此对于创建的数据库可以修改数据库编码为utf8，修改脚本：

alter database <数据库名> character set utf8; 

之后还是乱码，由于之前数据错误编码，所以设置utf8依旧乱码，删除数据重新导入即可。因此为了避免此问题，以后安装数据库首要任务就是配置编码，创建数据库时候指定编码：

创建数据库时候指定编码：

create database `mydb` character set utf8 collate utf8_general_ci;      #指定编码字符集

MariaDB [auth]> CREATE DATABASE `mydb` CHARACTER SET utf8 COLLATE utf8_general_ci;       
Query OK, 1 row affected (0.00 sec)

MariaDB [auth]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| auth |
| mydb |
| mysql |
| performance_schema |
| test |
+--------------------+
6 rows in set (0.00 sec)

MariaDB [client]> show variables like '%char%';
+--------------------------+----------------------------+
| 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)

MariaDB [auth]> use mydb;
Database changed
MariaDB [mydb]> show tables;
Empty set (0.00 sec)

MariaDB [mydb]> create table mydb_info(user_name char(20) not null, user_passwd char(30) default '',primary key(user_name));
Query OK, 0 rows affected (0.00 sec)

MariaDB [mydb]> show tables;
+----------------+
| Tables_in_mydb |
+----------------+
| mydb_info |
+----------------+
1 row in set (0.01 sec)

MariaDB [mydb]> insert into mydb_info(user_name,user_passwd) values('zhangsan',password('123'));
Query OK, 1 row affected, 1 warning (0.00 sec)

MariaDB [mydb]> select database();
+------------+
| database() |
+------------+
| mydb |
+------------+
1 row in set (0.00 sec)

MariaDB [mydb]> desc mydb_info;
+-------------+----------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------+----------+------+-----+---------+-------+
| user_name | char(20) | NO | PRI | NULL | |
| user_passwd | char(30) | YES | | | |
+-------------+----------+------+-----+---------+-------+
2 rows in set (0.00 sec)

MariaDB [mydb]> select * from mydb_info;
+-----------+--------------------------------+
| user_name | user_passwd |
+-----------+--------------------------------+
| zhangsan | *23AE809DDACAF96AF0FD78ED04B6A |
+-----------+--------------------------------+
1 row in set (0.00 sec)

MariaDB [mydb]> insert into mydb_info values('王五',password('123'));
Query OK, 1 row affected, 1 warning (0.01 sec)

MariaDB [mydb]> select * from mydb_info;
+-----------+--------------------------------+
| user_name | user_passwd |
+-----------+--------------------------------+
| zhangsan | *23AE809DDACAF96AF0FD78ED04B6A |
| 王五 | *23AE809DDACAF96AF0FD78ED04B6A |
+-----------+--------------------------------+
3 rows in set (0.00 sec)