Windows7下MySQL5.5.20免安装版的配置

MySQL Windows安装包说明：
1、mysql-5.5.20-win32.msi:Windows 安装包，图形化的下一步下一步的安装。
2、mysql-5.5.20.zip，这个是windows源文件，需要编译，对应的Linux源文件是mysql-5.5.20.tar.gz
3、mysql-5.5.20-win32.zip，这个文件解包后即可使用，是编译好的windows32位Mysql。

1、下载mysql-5.5.20-win32.zip，解压到D:\，D盘就会出现mysql-5.5.20-win32目录

2、配置MYSQL的环境变量
新增系统变量MYSQL_HOME： D:\mysql-5.5.20-win32
在PATH变量的最后面添加： ;%MYSQL_HOME%\bin
保存即可。

3、打开文件my-huge.ini另存为my.ini，删除my.ini中的所有配置，在my.ini文件中加入如下简单配置：(my.ini是保存在与my-huge.ini同一个目录下的）(#表示注释）

#ThefollowingoptionswillbepassedtoallMySQLclients
[client]
#password=your_password
port=3306
#设置mysql客户端的字符集
default-character-set=utf8

#TheMySQLserver
[mysqld]
port=3306
#设置mysql的安装目录
basedir=D:\mysql-5.5.20-win32
#设置mysql数据库的数据存放目录,必须是data或者\xxx-data
datadir=D:\mysql-5.5.20-win32\data
#设置服务器段的字符集
character_set_server=utf8

# The following options will be passed to all MySQL clients
[client]
#password	= your_password
port		= 3306
#设置mysql客户端的字符集
default-character-set = utf8

# The MySQL server
[mysqld]
port		= 3306
#设置mysql的安装目录
basedir = D:\mysql-5.5.20-win32
#设置mysql数据库的数据存放目录,必须是data或者\xxx-data
datadir = D:\mysql-5.5.20-win32\data
#设置服务器段的字符集
character_set_server = utf8

4、注册服务
运行-->cmd，输入命令：

mysqld--installmysql--defaults-file=d:\mysql-5.5.20-win32\my.ini

mysqld --install mysql --defaults-file=d:\mysql-5.5.20-win32\my.ini

或着，
运行-->cmd，输入命令：

mysqld--installmysql

mysqld --install mysql

删除服务：

scdeletemysql

sc delete mysql

在“服务”中就会出现mysql这一项。

5、启动服务：

netstartmysql

net start mysql

停止服务：

netstopmysql

net stop mysql

6、服务启动后：
登录MySQL服务器：
命令格式：

mysql-hhostname-uusername-p

mysql -h hostname -u username -p

或

mysql-hhostname-uusername-p

mysql -hhostname -uusername -p

命令说明：mysql命令将调用MySQL监视程序，这是一个可以将我们连接到MySQL服务器端的客户端命令行工具。
选项说明：
-h选项：用于指定所希望连接的主机，即运行MySQL服务器的机器。如果在运行MySQL服务器的机器上运行该命令，则可以忽略该选项和hostname参数；如果不是，必须用运行MySQL服务器的主机名称来代替主机名称参数。
-u命令：用于指定连接数据库时使用的用户名称。
-p命令：用于指定用户输入的密码

此时我本机安装了MYSQL，可忽略该选项和hostname参数：

mysql-uroot-p

mysql -uroot -p

注：
MySQL的管理员用户名为root，密码默认为空

修改root密码
MySQL配置好后，启动成功，默认密码是空，但是为了安全，设置密码（MySQL有一个默认用户名为root，密码自己设定：假如设为root）。
1）登录MySQL root用户：
打开命令行，执行：

mysql-uroot-p

mysql -uroot -p

2）修改root密码：

mysql>updatemysql.usersetpassword="root"whereUser="root";
mysql>flushprivileges;

   mysql> update mysql.user set password="root" where User="root";
   mysql> flush privileges;
   

修改该修改密码的语句：update mysql.user set password="root" where User="root";
为： update mysql.user set password=password("root") where User="root";

详细说明：见最底下的补充说明。

以后再进入MySQL，则为：

mysql-uroot-proot

mysql -uroot -proot

7、常用命令：

showdatabases;--显示数据库
usedatabasename;--用数据库
showtables;--显示表
createtabletablename(field-name-1fieldtype-1modifiers,field-name-2fieldtype-2modifiers,....);--创建表
altertabletablenameaddnew-fielnamenewfieldtype--为表加入新列
insertintotablename(fieldname-1,fieldname-2,fieldname-n)valuse(value-1,value-2,value-n)--增
deletefromtablenamewherefieldname=value--删
updatetablenamesetfieldname=new-valuewhereid=1--改
select*fromtablename--查
desctablename--表定义描述
showcreatetabletablename--可以查看引擎
altertabletablenameengine=InnoDB--修改引擎
createtabletablename(idint(11),namevarchar(10))type=INNODB--建表是设置引擎

show databases;--显示数据库
use databasename; --用数据库
show tables;--显示表
create table tablename(field-name-1 fieldtype-1 modifiers,field-name-2 fieldtype-2 modifiers,....);--创建表
alter table tablename add new-fielname new fieldtype--为表加入新列
insert into tablename(fieldname-1,fieldname-2,fieldname-n)valuse(value-1,value-2,value-n)--增
delete from tablename where fieldname=value--删
update tablename set fieldname=new-value where id=1--改
select * from tablename--查
desc tablename--表定义描述
show create table tablename--可以查看引擎
alter table tablename engine=InnoDB--修改引擎
create table tablename(id int(11),name varchar(10) )type=INNODB--建表是设置引擎

8、例如：
（1）登录MySQL服务器后，查看当前时间，登录的用户以及数据库的版本

mysql>selectnow(),user(),version();
+---------------------+----------------+-----------+
|now()|user()|version()|
+---------------------+----------------+-----------+
|2012-02-2620:29:51|root@localhost|5.5.20|
+---------------------+----------------+-----------+
1rowinset(0.00sec)

mysql> select now(),user(),version();
+---------------------+----------------+-----------+
| now()               | user()         | version() |
+---------------------+----------------+-----------+
| 2012-02-26 20:29:51 | root@localhost | 5.5.20    |
+---------------------+----------------+-----------+
1 row in set (0.00 sec)

（2）显示数据库列表

mysql>showdatabases;
+--------------------+
|Database|
+--------------------+
|information_schema|
|mysql|
|performance_schema|
|test|
+--------------------+
4rowsinset(0.03sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
+--------------------+
4 rows in set (0.03 sec)

（3）新增数据库并查看

mysql>createdatabasetest_db;
QueryOK,1rowaffected(0.00sec)

mysql>showdatabases;
+--------------------+
|Database|
+--------------------+
|information_schema|
|mysql|
|performance_schema|
|test|
|test_db|
+--------------------+
5rowsinset(0.00sec)

mysql> create database test_db;
Query OK, 1 row affected (0.00 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
| test_db            |
+--------------------+
5 rows in set (0.00 sec)

（4）选择数据库

mysql>usetest_db;
Databasechanged

mysql> use test_db;
Database changed

查看已选择的数据库：

mysql>selectdatabase();
+------------+
|database()|
+------------+
|test_db|
+------------+
1rowinset(0.00sec)

mysql> select database();
+------------+
| database() |
+------------+
| test_db    |
+------------+
1 row in set (0.00 sec)

（5）显示当前数据库的所有数据表

mysql>showtables;
Emptyset(0.00sec)

mysql> show tables;
Empty set (0.00 sec)

（6）新建数据表并查看

mysql>createtableperson(
->idint,
->namevarchar(20),
->sexchar(1),
->birthdate
->);
QueryOK,0rowsaffected(0.09sec)

mysql> create table person(
    -> id int,
    -> name varchar(20),
    -> sex char(1),
    -> birth date
    -> );
Query OK, 0 rows affected (0.09 sec)

mysql>showtables;
+-------------------+
|Tables_in_test_db|
+-------------------+
|person|
+-------------------+
1rowinset(0.00sec)

mysql> show tables;
+-------------------+
| Tables_in_test_db |
+-------------------+
| person            |
+-------------------+
1 row in set (0.00 sec)

（7）获取表结构

mysql>descperson;
+-------+-------------+------+-----+---------+-------+
|Field|Type|Null|Key|Default|Extra|
+-------+-------------+------+-----+---------+-------+
|id|int(11)|YES||NULL||
|name|varchar(20)|YES||NULL||
|sex|char(1)|YES||NULL||
|birth|date|YES||NULL||
+-------+-------------+------+-----+---------+-------+
4rowsinset(0.01sec)

mysql> desc person;
+-------+-------------+------+-----+---------+-------+
| Field | Type        | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id    | int(11)     | YES  |     | NULL    |       |
| name  | varchar(20) | YES  |     | NULL    |       |
| sex   | char(1)     | YES  |     | NULL    |       |
| birth | date        | YES  |     | NULL    |       |
+-------+-------------+------+-----+---------+-------+
4 rows in set (0.01 sec)

或者

mysql>describeperson;
+-------+-------------+------+-----+---------+-------+
|Field|Type|Null|Key|Default|Extra|
+-------+-------------+------+-----+---------+-------+
|id|int(11)|YES||NULL||
|name|varchar(20)|YES||NULL||
|sex|char(1)|YES||NULL||
|birth|date|YES||NULL||
+-------+-------------+------+-----+---------+-------+
4rowsinset(0.01sec)

mysql> describe person;
+-------+-------------+------+-----+---------+-------+
| Field | Type        | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id    | int(11)     | YES  |     | NULL    |       |
| name  | varchar(20) | YES  |     | NULL    |       |
| sex   | char(1)     | YES  |     | NULL    |       |
| birth | date        | YES  |     | NULL    |       |
+-------+-------------+------+-----+---------+-------+
4 rows in set (0.01 sec)

（8）查询表中的数据

mysql>select*fromperson;
Emptyset(0.00sec)

mysql> select * from person;
Empty set (0.00 sec)

（9）插入数据

mysql>insertintoperson(id,name,sex,birth)
->values(1,'zhangsan','1','1990-01-08');
QueryOK,1rowaffected(0.04sec)

mysql> insert into person(id,name,sex,birth)
    -> values(1,'zhangsan','1','1990-01-08');
Query OK, 1 row affected (0.04 sec)

查询表中的数据：

mysql>select*fromperson;
+------+----------+------+------------+
|id|name|sex|birth|
+------+----------+------+------------+
|1|zhangsan|1|1990-01-08|
+------+----------+------+------------+
1rowinset(0.00sec)

mysql> select * from person;
+------+----------+------+------------+
| id   | name     | sex  | birth      |
+------+----------+------+------------+
|    1 | zhangsan | 1    | 1990-01-08 |
+------+----------+------+------------+
1 row in set (0.00 sec)

（10）修改字段的类型

mysql>altertablepersonmodifysexchar(8);
QueryOK,1rowaffected(0.17sec)
Records:1Duplicates:0Warnings:0

mysql> alter table person modify sex char(8);
Query OK, 1 row affected (0.17 sec)
Records: 1  Duplicates: 0  Warnings: 0

查看字段描述：

mysql>descperson;
+-------+-------------+------+-----+---------+-------+
|Field|Type|Null|Key|Default|Extra|
+-------+-------------+------+-----+---------+-------+
|id|int(11)|YES||NULL||
|name|varchar(20)|YES||NULL||
|sex|char(8)|YES||NULL||
|birth|date|YES||NULL||
+-------+-------------+------+-----+---------+-------+
4rowsinset(0.01sec)

mysql> desc person;
+-------+-------------+------+-----+---------+-------+
| Field | Type        | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id    | int(11)     | YES  |     | NULL    |       |
| name  | varchar(20) | YES  |     | NULL    |       |
| sex   | char(8)     | YES  |     | NULL    |       |
| birth | date        | YES  |     | NULL    |       |
+-------+-------------+------+-----+---------+-------+
4 rows in set (0.01 sec)

（11）新增一个字段

mysql>altertablepersonadd(addressvarchar(50));
QueryOK,1rowaffected(0.27sec)
Records:1Duplicates:0Warnings:0

mysql> alter table person add(address varchar(50));
Query OK, 1 row affected (0.27 sec)
Records: 1  Duplicates: 0  Warnings: 0

查看字段描述：

mysql>descperson;
+---------+-------------+------+-----+---------+-------+
|Field|Type|Null|Key|Default|Extra|
+---------+-------------+------+-----+---------+-------+
|id|int(11)|YES||NULL||
|name|varchar(20)|YES||NULL||
|sex|char(8)|YES||NULL||
|birth|date|YES||NULL||
|address|varchar(50)|YES||NULL||
+---------+-------------+------+-----+---------+-------+
5rowsinset(0.01sec)

mysql> desc person;
+---------+-------------+------+-----+---------+-------+
| Field   | Type        | Null | Key | Default | Extra |
+---------+-------------+------+-----+---------+-------+
| id      | int(11)     | YES  |     | NULL    |       |
| name    | varchar(20) | YES  |     | NULL    |       |
| sex     | char(8)     | YES  |     | NULL    |       |
| birth   | date        | YES  |     | NULL    |       |
| address | varchar(50) | YES  |     | NULL    |       |
+---------+-------------+------+-----+---------+-------+
5 rows in set (0.01 sec)

（12）更新字段内容
查看修改前表的内容：

mysql>select*fromperson;
+------+----------+------+------------+---------+
|id|name|sex|birth|address|
+------+----------+------+------------+---------+
|1|zhangsan|1|1990-01-08|NULL|
+------+----------+------+------------+---------+
1rowinset(0.00sec)

mysql> select * from person;
+------+----------+------+------------+---------+
| id   | name     | sex  | birth      | address |
+------+----------+------+------------+---------+
|    1 | zhangsan | 1    | 1990-01-08 | NULL    |
+------+----------+------+------------+---------+
1 row in set (0.00 sec)

修改：

mysql>updatepersonsetname='lisi'whereid=1;
QueryOK,1rowaffected(0.04sec)
Rowsmatched:1Changed:1Warnings:0

mysql>select*fromperson;
+------+------+------+------------+---------+
|id|name|sex|birth|address|
+------+------+------+------------+---------+
|1|lisi|1|1990-01-08|NULL|
+------+------+------+------------+---------+
1rowinset(0.00sec)

mysql>updatepersonsetsex='man',address='China'whereid=1;
QueryOK,1rowaffected(0.04sec)
Rowsmatched:1Changed:1Warnings:0

mysql>select*fromperson;
+------+------+------+------------+---------+
|id|name|sex|birth|address|
+------+------+------+------------+---------+
|1|lisi|man|1990-01-08|China|
+------+------+------+------------+---------+
1rowinset(0.00sec)

mysql> update person set name='lisi' where id=1;
Query OK, 1 row affected (0.04 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select * from person;
+------+------+------+------------+---------+
| id   | name | sex  | birth      | address |
+------+------+------+------------+---------+
|    1 | lisi | 1    | 1990-01-08 | NULL    |
+------+------+------+------------+---------+
1 row in set (0.00 sec)

mysql> update person set sex='man',address='China' where id=1;
Query OK, 1 row affected (0.04 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select * from person;
+------+------+------+------------+---------+
| id   | name | sex  | birth      | address |
+------+------+------+------------+---------+
|    1 | lisi | man  | 1990-01-08 | China   |
+------+------+------+------------+---------+
1 row in set (0.00 sec)

为了方便下面测试删除数据，在向person表中插入2条数据：

mysql>insertintoperson(id,name,sex,birth,address)
->values(2,'wangwu','man','1990-01-10','China');
QueryOK,1rowaffected(0.02sec)

mysql>insertintoperson(id,name,sex,birth,address)
->values(3,'zhangsan','man','1990-01-10','China');
QueryOK,1rowaffected(0.04sec)

mysql>select*fromperson;
+------+----------+------+------------+---------+
|id|name|sex|birth|address|
+------+----------+------+------------+---------+
|1|lisi|man|1990-01-08|China|
|2|wangwu|man|1990-01-10|China|
|3|zhangsan|man|1990-01-10|China|
+------+----------+------+------------+---------+
3rowsinset(0.00sec)

mysql> insert into person(id,name,sex,birth,address)
    -> values(2,'wangwu','man','1990-01-10','China');
Query OK, 1 row affected (0.02 sec)

mysql> insert into person(id,name,sex,birth,address)
    -> values(3,'zhangsan','man','1990-01-10','China');
Query OK, 1 row affected (0.04 sec)

mysql> select * from person;
+------+----------+------+------------+---------+
| id   | name     | sex  | birth      | address |
+------+----------+------+------------+---------+
|    1 | lisi     | man  | 1990-01-08 | China   |
|    2 | wangwu   | man  | 1990-01-10 | China   |
|    3 | zhangsan | man  | 1990-01-10 | China   |
+------+----------+------+------------+---------+
3 rows in set (0.00 sec)

（13）删除表中的数据
删除表中指定的数据：

mysql>deletefrompersonwhereid=2;
QueryOK,1rowaffected(0.02sec)

mysql>select*fromperson;
+------+----------+------+------------+---------+
|id|name|sex|birth|address|
+------+----------+------+------------+---------+
|1|lisi|man|1990-01-08|China|
|3|zhangsan|man|1990-01-10|China|
+------+----------+------+------------+---------+
2rowsinset(0.00sec)

mysql> delete from person where id=2;
Query OK, 1 row affected (0.02 sec)

mysql> select * from person;
+------+----------+------+------------+---------+
| id   | name     | sex  | birth      | address |
+------+----------+------+------------+---------+
|    1 | lisi     | man  | 1990-01-08 | China   |
|    3 | zhangsan | man  | 1990-01-10 | China   |
+------+----------+------+------------+---------+
2 rows in set (0.00 sec)

删除表中全部的数据：

mysql>deletefromperson;
QueryOK,2rowsaffected(0.04sec)

mysql>select*fromperson;
Emptyset(0.00sec)

mysql> delete from person;
Query OK, 2 rows affected (0.04 sec)

mysql> select * from person;
Empty set (0.00 sec)

（14）重命名表
查看重命名前的表名：

mysql>showtables;
+-------------------+
|Tables_in_test_db|
+-------------------+
|person|
+-------------------+
1rowinset(0.00sec)

mysql> show tables;
+-------------------+
| Tables_in_test_db |
+-------------------+
| person            |
+-------------------+
1 row in set (0.00 sec)

重命名：

mysql>altertablepersonrenameperson_test;
QueryOK,0rowsaffected(0.04sec)

mysql>showtables;
+-------------------+
|Tables_in_test_db|
+-------------------+
|person_test|
+-------------------+
1rowinset(0.00sec)

mysql> alter table person rename person_test;
Query OK, 0 rows affected (0.04 sec)

mysql> show tables;
+-------------------+
| Tables_in_test_db |
+-------------------+
| person_test       |
+-------------------+
1 row in set (0.00 sec)

（15）新增主键

mysql>altertableperson_testaddprimarykey(id);
QueryOK,0rowsaffected(0.11sec)
Records:0Duplicates:0Warnings:0

mysql>descperson_test;
+---------+-------------+------+-----+---------+-------+
|Field|Type|Null|Key|Default|Extra|
+---------+-------------+------+-----+---------+-------+
|id|int(11)|NO|PRI|0||
|name|varchar(20)|YES||NULL||
|sex|char(8)|YES||NULL||
|birth|date|YES||NULL||
|address|varchar(50)|YES||NULL||
+---------+-------------+------+-----+---------+-------+
5rowsinset(0.00sec)

mysql> alter table person_test add primary key(id);
Query OK, 0 rows affected (0.11 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> desc person_test;
+---------+-------------+------+-----+---------+-------+
| Field   | Type        | Null | Key | Default | Extra |
+---------+-------------+------+-----+---------+-------+
| id      | int(11)     | NO   | PRI | 0       |       |
| name    | varchar(20) | YES  |     | NULL    |       |
| sex     | char(8)     | YES  |     | NULL    |       |
| birth   | date        | YES  |     | NULL    |       |
| address | varchar(50) | YES  |     | NULL    |       |
+---------+-------------+------+-----+---------+-------+
5 rows in set (0.00 sec)

删除主键：

mysql>altertableperson_testdropprimarykey;
QueryOK,0rowsaffected(0.18sec)
Records:0Duplicates:0Warnings:0

mysql>descperson_test;
+---------+-------------+------+-----+---------+-------+
|Field|Type|Null|Key|Default|Extra|
+---------+-------------+------+-----+---------+-------+
|id|int(11)|NO||0||
|name|varchar(20)|YES||NULL||
|sex|char(8)|YES||NULL||
|birth|date|YES||NULL||
|address|varchar(50)|YES||NULL||
+---------+-------------+------+-----+---------+-------+
5rowsinset(0.01sec)

mysql> alter table person_test drop primary key;
Query OK, 0 rows affected (0.18 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> desc person_test;
+---------+-------------+------+-----+---------+-------+
| Field   | Type        | Null | Key | Default | Extra |
+---------+-------------+------+-----+---------+-------+
| id      | int(11)     | NO   |     | 0       |       |
| name    | varchar(20) | YES  |     | NULL    |       |
| sex     | char(8)     | YES  |     | NULL    |       |
| birth   | date        | YES  |     | NULL    |       |
| address | varchar(50) | YES  |     | NULL    |       |
+---------+-------------+------+-----+---------+-------+
5 rows in set (0.01 sec)

（16）删除表

mysql>droptableperson_test;
QueryOK,0rowsaffected(0.04sec)

mysql>showtables;
Emptyset(0.00sec)

mysql> drop table person_test;
Query OK, 0 rows affected (0.04 sec)

mysql> show tables;
Empty set (0.00 sec)

（17）删除数据库

mysql>showdatabases;
+--------------------+
|Database|
+--------------------+
|information_schema|
|mysql|
|performance_schema|
|test|
|test_db|
+--------------------+
5rowsinset(0.00sec)

mysql>dropdatabasetest_db;
QueryOK,0rowsaffected(0.11sec)

mysql>showdatabases;
+--------------------+
|Database|
+--------------------+
|information_schema|
|mysql|
|performance_schema|
|test|
+--------------------+
4rowsinset(0.00sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
| test_db            |
+--------------------+
5 rows in set (0.00 sec)

mysql> drop database test_db;
Query OK, 0 rows affected (0.11 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
+--------------------+
4 rows in set (0.00 sec)

（18）查看建表语句

mysql>showcreatetabletable_name;

mysql> show create table table_name;

补充说明：
update mysql.user set password="root" where User="root";修改的不是密码，如果按照这个方式修改了，重新登录时将会报错：

mysql>updatemysql.usersetpassword="root"whereUser="root";
QueryOK,3rowsaffected(0.00sec)
Rowsmatched:3Changed:3Warnings:0

mysql>exit
Bye

C:\Users\liqiong>mysql-uroot-p
Enterpassword:****
ERROR1045(28000):Accessdeniedforuser'root'@'localhost'(usingpassword:Y
ES)

mysql> update mysql.user set password="root" where User="root";
Query OK, 3 rows affected (0.00 sec)
Rows matched: 3  Changed: 3  Warnings: 0

mysql> exit
Bye

C:\Users\liqiong>mysql -uroot -p
Enter password: ****
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: Y
ES)

请按照以下方式重新修改密码，即可登录成功：

C:\Users\liqiong>mysql-uroot
WelcometotheMySQLmonitor.Commandsendwith;or\g.
YourMySQLconnectionidis4
Serverversion:5.5.20MySQLCommunityServer(GPL)

Copyright(c)2000,2011,Oracleand/oritsaffiliates.Allrightsreserved.

OracleisaregisteredtrademarkofOracleCorporationand/orits
affiliates.Othernamesmaybetrademarksoftheirrespective
owners.

Type'help;'or'\h'forhelp.Type'\c'toclearthecurrentinputstatement.

mysql>updatemysql.usersetpassword=password("root")whereUser="root";
QueryOK,3rowsaffected(0.00sec)
Rowsmatched:3Changed:3Warnings:0

mysql>flushprivileges;
QueryOK,0rowsaffected(0.00sec)

mysql>exit
Bye

C:\Users\liqiong>mysql-uroot-p
Enterpassword:****
WelcometotheMySQLmonitor.Commandsendwith;or\g.
YourMySQLconnectionidis5
Serverversion:5.5.20MySQLCommunityServer(GPL)

Copyright(c)2000,2011,Oracleand/oritsaffiliates.Allrightsreserved.

OracleisaregisteredtrademarkofOracleCorporationand/orits
affiliates.Othernamesmaybetrademarksoftheirrespective
owners.

Type'help;'or'\h'forhelp.Type'\c'toclearthecurrentinputstatement.

mysql>

C:\Users\liqiong>mysql -uroot
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.5.20 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.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> update mysql.user set password=password("root") where User="root";
Query OK, 3 rows affected (0.00 sec)
Rows matched: 3  Changed: 3  Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> exit
Bye

C:\Users\liqiong>mysql -uroot -p
Enter password: ****
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.5.20 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.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>