没法启动MySQL服务,报的错误：1067，进程意外终止

昨天，闲着没事看着mysq本地连接里有不少数据库，还有一个mysql，感受不顺眼，就删了它，而后今天我再启动mysql就出现了这个问题：

我在 datadir的路径下找到.err文件，查看错误缘由：

121022 15:21:06 [Note] Plugin 'FEDERATED' is disabled.  
D:\software_builder\mysql\bin\mysqld: Table 'mysql.plugin' doesn't exist  
121022 15:21:06 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.  
121022 15:21:06 InnoDB: The InnoDB memory heap is disabled  
121022 15:21:06 InnoDB: Mutexes and rw_locks use Windows interlocked functions  
121022 15:21:06 InnoDB: Compressed tables use zlib 1.2.3  
121022 15:21:06 InnoDB: Initializing buffer pool, size = 500.0M  
121022 15:21:06 InnoDB: Completed initialization of buffer pool  
121022 15:21:06  InnoDB: Log file .\ib_logfile0 did not exist: new to be created  
InnoDB: Setting log file .\ib_logfile0 size to 100 MB  
InnoDB: Database physically writes the file full: wait...  
InnoDB: Progress in MB: 100  
121022 15:21:07  InnoDB: Log file .\ib_logfile1 did not exist: new to be created  
InnoDB: Setting log file .\ib_logfile1 size to 100 MB  
InnoDB: Database physically writes the file full: wait...  
InnoDB: Progress in MB: 100  
121022 15:21:10 InnoDB: highest supported file format is Barracuda.  
InnoDB: The log sequence number in ibdata files does not match  
InnoDB: the log sequence number in the ib_logfiles!  
121022 15:21:10  InnoDB: Database was not shut down normally!  
InnoDB: Starting crash recovery.  
InnoDB: Reading tablespace information from the .ibd files...  
InnoDB: Restoring possible half-written data pages from the doublewrite  
InnoDB: buffer...  
121022 15:21:10  InnoDB: Waiting for the background threads to start  
121022 15:21:11 InnoDB: 1.1.8 started; log sequence number 3700748  
121022 15:21:11 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist

解决办法

第一步：在mysql的安装目录下 basedir="D:/software_builder/mysql/的data文件夹里“D:\software_builder\mysql\data”" 下面还有一个mysql的文件夹（如图），

把“mysql文件夹”拷贝到数据库的数据存放位置的data文件夹下（个人是：C:\ProgramData\MySQL\MySQL Server 5.5\data）

而后重启mysql服务，这时候链接本地数据库，若是正常，则结束，若是报错：

提示：1045 access denied for user 'root'@'localhost' using password yes

进入命令行,来到mysql的安装目录.假设安装目录为 d:\mysql\ , CMD进入命令行
运行 d:\mysql\bin\mysqladmin -u root flush-privileges password "newpassword" 重设root密码
从新启动mysql服务

这时候就正常了