對於資料庫級的字符集，如果沒有辦法重建資料庫，可以在my.cnf檔案中使用character-set-server = utf8(要重啟資料庫服務)，對於之前已經存在資料庫，此引數不產生影響。如果之前的資料庫A是latin1，在A中建立的表預設還是latin1，除非指定DEFAULT CHARSET！然而對於新建的資料庫，則繼承 my.cnf檔案中使用character-set-server = utf8！

[root@rac3 ~]# more /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

user=mysql

old_passwords=1

character-set-server = utf8

關閉資料庫服務，並重新啟動！

[root@rac3 ~]# mysqladmin shutdown

[root@rac3 ~]# mysqld_safe &

[1] 15102

[root@rac3 ~]# Starting mysqld daemon with databases from /var/lib/mysql

[root@rac3 ~]# mysql

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 1

Server version: 5.0.45 Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> show variables like '%server%';

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

| Variable_name | Value |

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

| character_set_server | utf8 |

| collation_server | utf8_general_ci |

| server_id | 0 |

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

3 rows in set (0.00 sec)

--重新建立資料庫，檢視其預設字符集：為utf8

mysql> create database yql;

Query OK, 1 row affected (0.00 sec)

mysql> use yql;

Database changed

新建表的預設字符集和資料庫的預設字符集一致！

mysql> create table t(id int);

Query OK, 0 rows affected (0.00 sec)

mysql> show create table t;

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

| Table | Create Table |

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

| t | CREATE TABLE `t` (

`id` int(11) default NULL

) ENGINE=MyISAM DEFAULT CHARSET=utf8 |

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

1 row in set (0.00 sec)

mysql> show create database yql \G;

*************************** 1. row ***************************

Database: yql

Create Database: CREATE DATABASE `yql` /*!40100 DEFAULT CHARACTER SET utf8 */

1 row in set (0.00 sec)

ERROR:

No query specified

【Mysql】character-set-server引數

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