MySQL刪除data文件夾后，怎么都無法啟動了，出現錯誤：
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，找到這樣的結果 http://blog.csdn.net/indexman/article/details/16980433
呃，我用的是windows啊，好像也沒有那些命令
倒是有一個腳本mysql_install_db.pl，但似乎需要用perl來運行（剛找了一下發現在git bash里面有perl，可以試試）
在群里問了，有人提到，data目錄是不能刪的。原來如此，mysql有關鍵文件在里面啊，好難過。找同事的電腦，打開data文件夾，發現目標：
mysql 和 performance_schema
復制到data文件夾下面，啟動mysql，OK（中間還有一些小問題搜索下就出來了），困擾了我好久的神奇問題T_T
附上那mysql_install_db.pl的嘗試（先把那兩個目錄移走，再做的試驗）
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...
那倆文件夾也沒出來，試驗失敗。
那些愛折騰的孩子，再自己搗鼓搗鼓吧。