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ubuntu mysql�q�程�q�接

�q�L�v蓝梦 — Fri, 14 Jan 2011 06:11:00 GMT

ubuntu mysql�q�程�q�接

http://blog.csdn.net/helen_shw/archive/2010/01/22/5224524.aspxkiki@kiki-desktop:/etc/apache2

mysql error number 2003

Can't connect to MySQL server xxx.xxx.xxx.xxx (10061)

在ubuntu 9.04中默认安装了mysql�Q�默认只能本地访问，google了一下：(x��)

采用

��d��到MySQL服务器端�Q�在mysql库下执行

grant all on *.* to 'remote'@'172.16.21.39' identified by 'password';

卛_��

如果要设�|��ؓ(f��)��M��客户端都可以以root�q�接的话�Q�可以这么写�Q?br /> grant all on *.* to 'root'@'%' identifiied by 'root的密�?

格式�Q�grant select on 数据�?* to 用户名@��d��L�� identified by "密码"

�c�M��q�用�Ҏ(gu��)��的整理如下：(x��)

1�?nbsp;改表法。可能是你的帐号不允�总��q�程登陆�Q�只能在localhost。这个时候只要在localhost的那台电(sh��)脑，��d��mysql后，更改 "mysql" 数据库里�?nbsp;"user" 表里�?nbsp;"host" ��，�?localhost"改称"%"

mysql -u root -pvmwaremysql>use mysql;mysql>update user set host = '%' where user = 'root';mysql>select host, user from user;

2. 授权法。例如，你想myuser使用mypassword从�Q何主��接到mysql服务器的话�?/p>

GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;

如果你想允许用户myuser从ip�?92.168.1.3的主��接到mysql服务器，�q��用mypassword作�ؓ(f��)密码

GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'192.168.1.3' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;

但问题仍没有解决�Q?/p>

扑ֈ� 命��o(h��) mysql> flush privileges //使修改生�?/p>

昄��影响了零行�?/p>

问题依然没有解决�Q�重新启动mysql sudo /etc/init.d/mysql restart

�q�是不行�?/p>

�?http://www.aygfsteel.com/waterjava/archive/2008/04/27/196385.html

了解到mysql有本机绑定，扑ֈ�问题所在�?/p>

�~�辑 /etc/mysql/my.cnf

# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address = 127.0.0.1

��?#8221;bind-address = 127.0.0.1“注释
sudo /etc/init.d/mysql restart重启卛_��q�程讉K��

问题解决

****************************************************************************************
root@kiki-desktop:/etc/apache2# apt-get install libapache2-mod-auth-mysql
apt-get install lighttpd
apt-get install openssl
root@kiki-desktop:/etc/apache2# apt-get install libapache2-mod-gnutls

$ mysql -u root -p
mysql> use authz_db;

mysql> CREATE TABLE users(
    -> user_name CHAR(30) NOT NULL,
    -> user_passwd CHAR(20) NOT NULL,
    -> PRIMARY KEY (user_name)
    -> );

mysql> GRANT SELECT
    -> ON authz_db.users
    -> TO authuser@localhost
    -> IDENTIFIED BY 'Your Password Here';

    mysql> flush privileges;

    mysql> INSERT INTO users VALUES('test',ENCRYPT('TEST'));



root@kiki-desktop:/etc/apache2# chkconfig --level 35 mysqld on

---------------------------------
如果要设�|��ؓ(f��)��M��客户端都可以以root�q�接的话�Q�可以这么写�Q?br /> grant all on *.* to 'root'@'%' identifiied by 'root的密�?

�q�入mysql,
grant all on *.* to 'root'@'%' identifiied by 'root的密�?

root@kiki-desktop:/etc/mysql# vim /etc/mysql/my.cnf
�~�辑 /etc/mysql/my.cnf

# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address = 127.0.0.1
��?#8221;bind-address = 127.0.0.1“注释

root@kiki-desktop:/etc/mysql# /etc/init.d/mysql restart

�q�L�v蓝梦 2011-01-14 14:11 发表评论

sql 字段��D�{成大写的函数

�q�L�v蓝梦 — Thu, 09 Dec 2010 09:11:00 GMT

原文�Q�http://www.baicaiba.com/article/Default.aspx?Id=26
sql中常常碰到大写�{��写�Q�在SQL Server可以很方便的�q�行大小写�{换，具体�Ҏ(gu��)��如下�Q? Upper(expr) :转换为大�? Lower(expr)�Q��{换�ؓ(f��)��写
范例:(1)Select lower(title) from baicaiba
(2)Select Upper(title) from baicaiba

�q�L�v蓝梦 2010-12-09 17:11 发表评论

聚合函数-解释实例

�q�L�v蓝梦 — Thu, 09 Dec 2010 09:09:00 GMT

一、相��x��?/span>

如果在对数据�q�行�l�计分析�Ӟ��既需要保存查询结果，又能在查询结果下面将�l�计�l�果昄��出来�Q�我们可以��用compute by 子句�?/p>

Compute子句用于生成合计�Q��ƈ��其作�ؓ(f��)附加的汇��d��出现在结果集的最后，当与by一起��用时�Q�Compute子句在结果集内生成控件中断和分类汇怅R��可在同一查询内指定Compute by和Compute�?/p>

其语法格式如下：(x��)

[Compute

{

{Avg | count | max | min | stdev | stdevp| var | varp | sum (expression)}[,…n]

[by expressin [,….]]

}]

Compute子句中��用的聚合函数

注意�Q�聚合函��C��能��用字�D�别名�?/span>

二、实例说�?/span>

1、准备工�?/span>

    
            01
            if object_id('student','table') is not null
        
            02
            drop table student
        
            03
            go
        
            04
            create table student
        
            05
            (
        
            06
            ID int identity(1,1) not null,
        
            07
            sex varchar(4) not null,
        
            08
            sclass varchar(10),
        
            09
            score int ,
        
            10
            constraint zhujian primary key(ID),
        
            11
            constraint scorecheck check(score>0 and score<=10)
        
            12
             
            13
            )
        
            14
            insert into student values('�?,1,2)
        
            15
            insert into student values('�?,2,4)
        
            16
            insert into student values('�?,2,6)
        
            17
            insert into student values('�?,1,2)
        
            18
            insert into student values('�?,3,3)
        
            19
            insert into student values('�?,2,5)

2、group by子句

    
            1
            --group字句
        
            2
            select sex,sclass,score,sum(score) as ��d��
        
            3
            from student
        
            4
            group by sex,sclass,score
        
            5
            order by sex

�l�果如下�Q?/div>

3、��用compute by子句

    
            1
            --comlpute by字句
        
            2
            select sex,sclass,score,sum(score) as ��d��
        
            3
            from student
        
            4
            group by sex,sclass,score
        
            5
            order by sex
        
            6
            compute sum(score),avg(score),max(score),min(score) by sex

�l�果如下�Q?/div>

完工�Q�拜拜�?br /> 原文 �Q?http://www.cnblogs.com/yuananyun/archive/2010/11/25.html

�q�L�v蓝梦 2010-12-09 17:09 发表评论