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:wampinmysqlmysql5.5.24>D:WorkgitPortableGit-1.8.4-preview20130916inperl.exe C:wampinmysqlmysql5.5.24scriptsmysql_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:wampinmysqlmysql5.5.24>D:WorkgitPortableGit-1.8.4-preview20130916inperl.exe C:wampinmysqlmysq
l5.5.24scriptsmysql_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。