mysql5安装与配置

MySQL 的安装
1 点击mysql安装包
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2 默认是Typical，如果想修改安装路径的话也可以选择custom.
注意：安装mysql的路径中，不能含有中文！
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3 安装开始
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4 跳过注册
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5 是否现在就配置 mysql。也可以之后在开始菜单的configuration wizard 进行配置
  这里是现在进行配置
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6 选择Detailed Configuration，点Next继续
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7 下面这个选项是选择mysql应用于何种类型，第一种是开发服务器，
将只用尽量少的内存，第二种是普通WEB服务器，将使用中等数量内存，
最后一种是这台服务器上面只跑mysql数据库，将占用全部的内存。
用户可根据自己的需求，选择选项。这里只选择开发服务器，点Next继续
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8 下面是选择数据库用途，第一种是多功能用途，
将把数据库优化成很好的innodb存储类型和高效率的myisam存储类型，
第二种是只用于事务处理类型，最好的优化innodb，但同时也支持myisam，只有myisam才支持全文索引
最后一种是非事务处理类型，适合于简单的应用，只有不支持事务的myisam类型是被支持的。
一般选择第一种多功能的。
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9 下面是选择InnodDB的数据存放位置，一般默认好了，不需要改动
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10 下面是选择mysql允许的最大连接数，第一种是最大20个连接并发数，
第二种是最大500个并发连接数，最后 一种是自定义，你可以根据自己的需要选择。
这里选择第一个
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11下面是选择数据库监听的端口，一般默认是3306，如果改成其他端口，
以后连接数据库的时候都要记住修改的端口，否则不能连接mysql数据库，
比较麻烦，这里不做修改，用mysq的默认端口：3306
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12 这一步设置mysql的默认编码，默认是latin1，也是标准的编码
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13 们可以根据需要，把它改成gb2312或gbk。编码是版本4.1以上引入的。
如果要用原来数据库的数据，最好能确定原来数据库用的是什么编码，
如果这里设置的编码和原来数据库数据的编码不一致，在使用的时候可能会出现乱码
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14 这一步是是否要把mysql设置成windows的服务，一般选择设成服务，
这样以后就可以通过服务中启动和关闭mysql数据库了。推荐：下面的复选框也勾选上，
这样，在cmd模式下，不必非到mysql的bin目录下执行命令。在命令行下咨询可以执行文件
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15 这一步是设置mysql的超级用户密码，这个超级用户非常重要，
对mysql拥有全部的权限，请设置好并牢记超级用户的密码，
下面有个复选框是选择是否允许远程机器用root用户连接到你的mysql服务器上面，
如果有这个需求，也请勾选。
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16 点击 Execute
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17 到这一步
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18 我们可以开始使用mysql了，打开开始菜单的 mysql Command line Client，输入密码
出现这个界面说明mysql已经安装好了
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可能出现的问题：
如果在第15步，你出现的界面是像下面这样
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有三个输入密码的地方，则有可能您是在原来基础上安装的。
你在第一个文本框输入原来root的密码，后面两个文本框输入root的新密码，
点击Next基础，出现下图
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给您推荐几种解决办法：
1、        点Retry，重试；
2、         再运行一次设置，看到有关“移除原设置”的选项，选择移除，然后在重新设置。
3、        重装。
重装注意事项：最好删除原来的所有文件，必要的话，可以清一下注册表，
如果你机器上没有其它mysql相关的程序。而且一定记得不要保留原有的my.ini文件。
还有就是删除原来安装路径下的文件，并删除数据目录下面的ibdata1文件.