mysql数据库操做

mysql数据库操做：http://www.cnblogs.com/ggjucheng/archive/2012/11/02/2751840.html

建立数据库

最简单的方式

CREATE DATABASE  my_db;

或者是

CREATE DATABASE IF NOT EXISTS my_db;

 

建立utf8编码的数据库

CREATE DATABASE IF NOT EXISTS my_db default character set utf8 COLLATE utf8_general_ci;

那么在这个数据库下建立的全部数据表的默认字符集都会是utf8了，注意后面这句话 "COLLATE utf8_general_ci",大体意思是在排序时根据utf8变码格式来排序

 

查看数据库列表

show databases;

 

使用数据库

use my_db;

 

查看数据库默认编码

show variables like 'character_set_%'

+--------------------------+-------------------------------------------------------+
| Variable_name            | Value                                                 |
+--------------------------+-------------------------------------------------------+
| character_set_client     | utf8                                                  |
| character_set_connection | utf8                                                  |
| character_set_database   | latin1                                                |
| character_set_filesystem | binary                                                |
| character_set_results    | utf8                                                  |
| character_set_server     | latin1                                                |
| character_set_system     | utf8                                                  |
| character_sets_dir       | /usr/local/mysql-5.5.28-linux2.6-i686/share/charsets/ |
+--------------------------+-------------------------------------------------------+

能够看到character_set_database是lantin1.

 

修改数据库编码

alter database my_db character set latin1;

 

删除数据库

drop database my_db;

 或者是

drop database IF EXISTS my_db;