D:\Program Files\MySQL\MySQL Server 5.5\C:\Documents and Settings\All Users\Application Data\MySQL\MySQL Server 5.5\data\D:\Program Files\MySQL\MySQL Server 5.5\data\net stop mysql55

data 為 data-bakC:\Documents and Settings\All Users\Application Data\MySQL\MySQL Server 5.5\data 複製到程序目錄
C:\Documents and Settings\All Users\Application Data\MySQL\MySQL Server 5.5\my.inidatadir,新增:datadir="D:\Program Files\MySQL\MySQL Server 5.5\data"
my.ini 複製到程序目錄 D:\Program Files\MySQL\MySQL Server 5.5\
net start mysql55
mysql -u root -p -e "SHOW VARIABLES LIKE 'datadir';"

輸出顯示 datadir: D:\Program Files\MySQL\MySQL Server 5.5\data\,遷移成功。