2、編輯mysql的運行配置文件my.ini，如果沒有，可以拿my-medium.ini復制然后更名成 my.ini 

復制代碼代碼如下:

# Example MySQL config file for medium systems.   
#   
# This is for a system with little memory (32M - 64M) where MySQL plays   
# an important part, or systems up to 128M where MySQL is used together with   
# other programs (such as a web server)   
#   
# You can copy this file to   
# /etc/my.cnf to set global options,   
# mysql-data-dir/my.cnf to set server-specific options (in this   
# installation this directory is C:\mysql\data) or   
# ~/.my.cnf to set user-specific options.   
#   
# In this file, you can use all long options that a program supports.   
# If you want to know which options a program supports, run the program   
# with the "--help" option.   

# The following options will be passed to all MySQL clients   
[client]   
#password   = your_password  
port        = 3306  
socket      = /tmp/mysql.sock   

# Here follows entries for some specific programs   

# The MySQL server   
[mysqld]   
basedir = "C:\MySQL5"  
datadir = "C:\MySQL5\data"  
default-character-set=utf8  

port        = 3306  
socket      = /tmp/mysql.sock   
skip-locking   
key_buffer = 16M  
max_allowed_packet = 1M  
table_cache = 64  
sort_buffer_size = 512K  
net_buffer_length = 8K  
read_buffer_size = 256K  
read_rnd_buffer_size = 512K  
myisam_sort_buffer_size = 8M  

# Don't listen on a TCP/IP port at all. This can be a security enhancement,   
# if all processes that need to connect to mysqld run on the same host.   
# All interaction with mysqld must be made via Unix sockets or named pipes.   
# Note that using this option without enabling named pipes on Windows   
# (via the "enable-named-pipe" option) will render mysqld useless!   
#    
#skip-networking   

# Disable Federated by default   
skip-federated   

# Replication Master Server (default)   
# binary logging is required for replication   
log-bin=mysql-bin   

# required unique id between 1 and 2^32 - 1   
# defaults to 1 if master-host is not set   
# but will not function as a master if omitted   
server-id   = 1  

# Replication Slave (comment out master section to use this)   
#   
# To configure this host as a replication slave, you can choose between   
# two methods :   
#   
# 1) Use the CHANGE MASTER TO command (fully described in our manual) -   
#    the syntax is:   
#   
#    CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,   
#    MASTER_USER=<user>, MASTER_PASSWORD=<password> ;   
#   
#    where you replace <host>, <user>, <password> by quoted strings and   
#    <port> by the master's port number (3306 by default).   
#   
#    Example:   
#   
#    CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,   
#    MASTER_USER='joe', MASTER_PASSWORD='secret';   
#   
# OR   
#   
# 2) Set the variables below. However, in case you choose this method, then   
#    start replication for the first time (even unsuccessfully, for example   
#    if you mistyped the password in master-password and the slave fails to   
#    connect), the slave will create a master.info file, and any later   
#    change in this file to the variables' values below will be ignored and   
#    overridden by the content of the master.info file, unless you shutdown   
#    the slave server, delete master.info and restart the slaver server.   
#    For that reason, you may want to leave the lines below untouched   
#    (commented) and instead use CHANGE MASTER TO (see above)   
#   
# required unique id between 2 and 2^32 - 1   
# (and different from the master)   
# defaults to 2 if master-host is set   
# but will not function as a slave if omitted   
#server-id       = 2  
#   
# The replication master for this slave - required   
#master-host     =   <hostname>  
#   
# The username the slave will use for authentication when connecting   
# to the master - required   
#master-user     =   <username>  
#   
# The password the slave will authenticate with when connecting to   
# the master - required   
#master-password =   <password>  
#   
# The port the master is listening on.   
# optional - defaults to 3306   
#master-port     =  <port>  
#   
# binary logging - not required for slaves, but recommended   
#log-bin=mysql-bin   

# Point the following paths to different dedicated disks   
#tmpdir     = /tmp/        
#log-update     = /path-to-dedicated-directory/hostname   

# Uncomment the following if you are using BDB tables   
#bdb_cache_size = 4M  
#bdb_max_lock = 10000  

# Uncomment the following if you are using InnoDB tables   
#innodb_data_home_dir = C:\mysql\data/   
#innodb_data_file_path = ibdata1:10M:autoextend   
#innodb_log_group_home_dir = C:\mysql\data/   
#innodb_log_arch_dir = C:\mysql\data/   
# You can set .._buffer_pool_size up to 50 - 80 %   
# of RAM but beware of setting memory usage too high   
#innodb_buffer_pool_size = 16M  
#innodb_additional_mem_pool_size = 2M  
# Set .._log_file_size to 25 % of buffer pool size   
#innodb_log_file_size = 5M  
#innodb_log_buffer_size = 8M  
#innodb_flush_log_at_trx_commit = 1  
#innodb_lock_wait_timeout = 50  

[mysqldump]   
quick   
max_allowed_packet = 16M  

[mysql]   
no-auto-rehash   
# Remove the next comment character if you are not familiar with SQL   
#safe-updates   

[isamchk]   
key_buffer = 20M  
sort_buffer_size = 20M  
read_buffer = 2M  
write_buffer = 2M  

[myisamchk]   
key_buffer = 20M  
sort_buffer_size = 20M  
read_buffer = 2M  
write_buffer = 2M  

[mysqlhotcopy]   
interactive-timeout 

[mysqld] 
# 設置mysql的安裝目錄 
basedir=$MYSQL_HOME 
# 設置mysql數據庫的數據的存放目錄，必須是data，或者是\\xxx\data 
datadir=$MYSQL_HOME\data 
# 設置mysql服務器的字符集
default-character-set=utf8 

[client]
# 設置mysql客戶端的字符集
default-character-set=gbk

復制代碼代碼如下:

<STRONG><SPAN style="COLOR: #ffffff" style="COLOR: #ffffff">C:\>cd MySQL5   

C:\MySQL5>cd bin   

C:\MySQL5\bin>mysql -uroot -p   
Enter password:   
Welcome to the MySQL monitor.  Commands end with ; or \g.   
Your MySQL connection id is 3   
Server version: 5.0.67-community-log MySQL Community Edition (GPL)   

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.   

mysql> use mysql   
Database changed   
mysql> update User set Password=PASSWORD('admin') where User='root';   
Query OK, 2 rows affected (0.08 sec)   
Rows matched: 2  Changed: 2  Warnings: 0</SPAN>  

</STRONG>