Ubuntu下配置网络，安装mysql，jdk
sudo apt-get install mysql-server mysql-client
sudo apt-get install sun-java6-jdk(安装出意外，sudo dpkg -P sun-java6-bin，然后重新安装)
sudo vi /etc/network/interfaces 配置网络
auto eth0
iface eth0 inet dhcp(static)
address 192.168.8.108
netmask 255.255.255.0
gateway 192.168.8.1
：x保存
sudo ifconfig eth0 down (up)关闭和启动
sudo /etc/init.d/networking restart
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远程授权访问msyql
GRANT ALL PRIVILEGES ON *.* TO 'root'@'192.168.8.108' IDENTIFIED BY '' WITH GRANT OPTION ;
etc/mysql/my.cnf注释掉 bind 127.0.0.1
重新启动mysql :sudo /etc/init.d/mysql restart
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相关文档：
To shut down the cluster, enter the following command in a shell
on the machine hosting the management node:
shell> ndb_mgm -e shutdown
The -e
option here is used to pass a command to
the ndb_mgm
client from the shell. (See
Section 4.23, “ ......
GROUP_CONCAT 是一个合并多行的函数，一般用的少，所以很多人都不知道，我也是一个，今天偶然看到，故记下方法；
GROUP_CONCAT的语法如下：
GROUP_CONCAT([DISTINCT] expr [,expr ...][ORDER BY {unsigned_integer | col_name | expr}[ASC | DESC] [,col_name ...]][SEPARATOR str_val])
下面演示一下这个函数，先建立� ......
1.配置名字为myodbc的数据源
2.在stdafx.h中加上
#import "c:\program files\common files\system\ado\msado15.dll" no_namespace rename ("EOF", "adoEOF")
3.在程序初始化的方法中加上
AfxEnableControlContainer();
// 初始化COM,创建ADO连接等操作
AfxOleInit();
4.在合适的地方加上
public:_ConnectionPt ......
If you set it in the cnf(it may be my.ini file) you will likely need to restart the server. Optionally, that is a dynamic variable and can be SET GLOBAL or SET SESSION from the command line as well.So just do as follows.
mysql>show variables like’max_allowed_packet’;
......
