windows 下使用面安裝版MySql5.5步驟如下
1、解壓下載的壓縮文件到指定文件夾。如：F:\DB\mysql-5.5.18-win32\mysql-5.5.18-win32；
2、在根目錄F:\DB\mysql-5.5.18-win32\mysql-5.5.18-win32下創建配置文件my.ini，可從根目錄中的my-huge.ini,my-innodb-heavy-4G.ini,my-large.ini,my-medium.ini,my-small.ini下複製一個將其名稱改為my.ini；
用記事本打開my.ini并在其中添加如下內容
# set basedir to your installation path
basedir=F:/DB/mysql-5.5.18-win32/mysql-5.5.18-win32
# set datadir to the location of your data directory
datadir=F:/DB/data
character-set-server = utf8
collation-server = utf8_general_ci
3、如果是win7系統並且你在my.ini中配置了datadir參數，記得將解壓出來的mysql跟目錄下的data文件裏面的內容夾複製到my.ini文件中配置的datadir指定的目錄下，這裡是F:/DB/data。否則數據庫無法啟動。
4、配置windows系統環境變量，添加MYSQL_HOME = F:/DB/mysql-5.5.18-win32/mysql-5.5.18-win32，在PATH中添加%MYSQL_HOME%\bin。
5、在doc命令行下輸入命令：mysqld -u -root啟動mysql服務；
6、新開一個doc窗口，輸入命令：mysql，顯示如下信息則說明服務啟動成功
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.5.18-log MySQL Community Server (GPL)
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
至此，mysql安裝完成。
