mysql-5.7.10-winx64

启动 mysqld.exe，报错：

mysqld: Could not create or access the registry key needed for the MySQL application

to log to the Windows EventLog. Run the application with sufficient

privileges once to create the key, add the key manually, or turn off

logging for that application.

加参数 mysqld.exe --console，查看启动 log

[ERROR] Cannot open Windows EventLog; check privileges, or start server with --log_syslog=0

第一个 [ERROR]，关于Windows EventLog，忽略

[ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.

第二处 [ERROR]，mysql.plugin

[ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist

第三处 [ERROR]，Table 'mysql.user' doesn't exist。可以判断初始化出了问题

运行：

mysqld --initialize-insecure

注：在初始化时如果加上 –initial-insecure，则会创建空密码的 root@localhost 账号，否则会创建带密码的 root@localhost 账号，密码直接写在日志文件中(datadir/hostname.err)

问题解决~