Mysql5.7.17在windows下安装启动时提示不成功问题的解决办法

在机器上首次安装MySQL，

操作系统是win7

mysql 的安装文件是 zip 格式的，版本是5.7.17

解压之后，安装步骤是

1、首先找个文件存放这些安装程序以及 数据

假设是E:\\mysql

2、把解压的文件放在E:\\mysql下，并且新建个data文件夹

3、创建环境变量mysql 路径是E:\\mysql

添加到path 中 %MYSQL%\bin;

4、在解压的文件夹下有个my-default.ini

的文件，首先拷贝一份，重命名为my.ini

修改文件内容

只修改两行就行

basedir = E:\\mysql 
datadir = E:\\mysql\\data

这两行原先是用#号注释掉的，

5、用系统管理员身份启动命令行

输入mysqld -install

这个是安装mysql 服务的

6、输入 mysqld --initialize

这个是因为 自动5.7.7版本之后，windows安装mysql通过zip解压的方式，不再包含data 文件夹，

如果没有data文件夹，则会在启动mysql服务的时候起不来，观察data文件夹下后缀名是.err的文件就可以发现，会报这么一些错误

MySQL: Table 'mysql.plugin' doesn't exist 
2017-01-01T17:13:33.200113Z 0 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. 
2017-01-01T17:13:33.202113Z 0 [Note] Salting uuid generator variables, current_pid: 6908, server_start_time: 1483290810, bytes_sent: 0,  
2017-01-01T17:13:33.237115Z 0 [Note] Generated uuid: '9fb87162-d045-11e6-b092-00ff173a9c42', server_start_time: 1483297718, bytes_sent: 114009376 
2017-01-01T17:13:33.241115Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 9fb87162-d045-11e6-b092-00ff173a9c42. 
2017-01-01T17:13:33.248116Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 
2017-01-01T17:13:33.250116Z 0 [Warning] Failed to set up SSL because of the following SSL library error: SSL context is not usable without certificate and private key 
2017-01-01T17:13:33.254116Z 0 [Note] Server hostname (bind-address): '*'; port: 3306 
2017-01-01T17:13:33.259116Z 0 [Note] IPv6 is available. 
2017-01-01T17:13:33.260117Z 0 [Note]  - '::' resolves to '::'; 
2017-01-01T17:13:33.261117Z 0 [Note] Server socket created on IP: '::'. 
2017-01-01T17:13:33.266117Z 0 [Warning] Failed to open optimizer cost constant tables 
2017-01-01T17:13:33.268117Z 0 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist 
2017-01-01T17:13:33.270117Z 0 [ERROR] Aborting

其实这是因为这些表示放在data文件夹下的，所以我们需要先执行命令mysqld -initialize在完成mysql 的初始化，这样的话，mysql会自动完成一些初始化的工作

7、启动服务 net start mysql

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