MySQL删除data文件夹后，怎么都无法启动了，出现错误：
150106 9:28:43 [Note] Plugin \'FEDERATED\' is disabled.
wampmysqld: Table \'mysql.plugin\' doesn\'t exist
150106 9:28:43 [ERROR] Can\'t open the mysql.plugin table. Please run mysql_upgrade to create it.
150106 9:28:43 InnoDB: The InnoDB memory heap is disabled
150106 9:28:43 InnoDB: Mutexes and rw_locks use Windows interlocked functions
150106 9:28:43 InnoDB: Compressed tables use zlib 1.2.3
150106 9:28:43 InnoDB: Initializing buffer pool, size = 141.0M
150106 9:28:43 InnoDB: Completed initialization of buffer pool
150106 9:28:43 InnoDB: highest supported file format is Barracuda.
150106 9:28:43 InnoDB: Waiting for the background threads to start
150106 9:28:44 InnoDB: 1.1.8 started; log sequence number 1595675
150106 9:28:44 [Note] Server hostname (bind-address): \'(null)\'; port: 3306
150106 9:28:44 [Note] - \'(null)\' resolves to \'::\';
150106 9:28:44 [Note] - \'(null)\' resolves to \'0.0.0.0\';
150106 9:28:44 [Note] Server socket created on IP: \'0.0.0.0\'.
150106 9:28:44 [ERROR] Fatal error: Can\'t open and lock privilege tables: Table \'mysql.host\' doesn\'t exist
搜索最后一句，找到这样的结果 http://blog.csdn.net/indexman/article/details/16980433
呃，我用的是windows啊，好像也没有那些命令
倒是有一个脚本mysql_install_db.pl，但似乎需要用perl来运行（刚找了一下发现在git bash里面有perl，可以试试）
在群里问了，有人提到，data目录是不能删的。原来如此，mysql有关键文件在里面啊，好难过。找同事的电脑，打开data文件夹，发现目标：
mysql 和 performance_schema
复制到data文件夹下面，启动mysql，OK（中间还有一些小问题搜索下就出来了），困扰了我好久的神奇问题T_T
附上那mysql_install_db.pl的尝试（先把那两个目录移走，再做的试验）
C:\wamp\bin\mysql\mysql5.5.24>D:\Work\git\PortableGit-1.8.4-preview20130916\bin\perl.exe C:\wamp\bin\mysql\mysql5.5.24\scripts\mysql_install_db.pl --basedir=.
FATAL ERROR: Neither host \'ARLIANG\' nor \'localhost\' could be looked up with
./bin/resolveip
Please configure the \'hostname\' command to return a correct
hostname.
If you want to solve this at a later stage, restart this script
with the --force option
C:\wamp\bin\mysql\mysql5.5.24>D:\Work\git\PortableGit-1.8.4-preview20130916\bin\perl.exe C:\wamp\bin\mysql\mysq
l5.5.24\scripts\mysql_install_db.pl --basedir=. --force
Installing MySQL system tables...
那俩文件夹也没出来，试验失败。
那些爱折腾的孩子，再自己捣鼓捣鼓吧。