MySQL

Need to learn SQL language, according to the recommended installation of free MySQL to learn! Previously learned to practice SQL Sever on SQL statement, because it is in the school room directly, for the installation of data management software has

1. Modify the configuration filesudo vim/etc/mysql/my.cnfChange the value of the bind-address parameter to your internal/external network IP or 0.0.0.0, or comment out the line directly.2. Log in to the databaseMysql-u root-pEnter passwordmysql> use

One, backup and import of database1), Backup of the database1. Export the entire databaseMysqldump-u user name-p database name > exported file nameExample: Mysqldump-u dbadmin-p myblog >/home/zhangy/blog/database_bak/myblog.sql2. Export a

When insert fails, you may want to record its error information in the log file, such as the cause of the error, the time of the error, and so on. The following code creates a primary key table and a foreign key table. Then the value thrown into the

1.MySQL Copy the same table structure method:1) CREATE TABLE table_name as SELECT * FROM table1 where 1=2 (or limit 0);2) CREATE TABLE table_name like table1_name;The use of the two:As: Used to create the same table structure and copy the source

Import Java.sql.connection;import Java.sql.drivermanager;import Java.sql.sqlexception;public class DBConnection { Private static final String name = "root";p rivate static final String pass = "";p ublic static Connection Connectdb () {Conn Ection

1. Normal start/etc/init.d/mysqld startThis mysqld is a copy of the Mysql.server in the installation package , as followsCP Support-files/mysql.server/etc/init.d/mysqldSee if the port is upNETSTAT-NULTP |grep 3306To see if there are related

1. Normal start/etc/init.d/mysqld startThis mysqld is a copy of the Mysql.server in the installation package , as followsCP Support-files/mysql.server/etc/init.d/mysqldSee if the port is upNETSTAT-NULTP |grep 3306To see if there are related

1.mysql 2.mysql-uroot "= = just installed the system without password situation login mode, do not password.3.mysql-uroot-p 4.mysql-uroot-p ' 123456 ' MySQL Multi-Instance login methodMysql-uroot-p-s/data/3306/mysql.sockNote: Remote connections for

The database to be migrated is as follows: Mysql>show databases;+--------------------+| Database |+--------------------+|Information_schema||Forbk||Hive||Mysql||Test|+--------------------+5Rowsinch Set(0.00sec) MySQL>

In the daily development process of access to SQL Server and MySQL database operational issues, it may be that the previous contact is SQL Servers before beginning to contact MySQL, always feel that using MySQL is not using SQL Server so handy, some

1, in order to give access to the user of MySQL client, we can authorize the user by the following way:Mysql> Grant All on * * to [e-mail protected] '% ' identified by ' User_password ';The user rights granted by the above command can access any

The project uses Springmvc+mybatis + MySQL development, requires transaction management functions, configured as follows1.service.xml Configuration ${jdbc.driverClassName} ${jdbc.url} & lt;/property> ${jdbc.username} ${jdbc.password}

Weka connect the database around a lot of circles, always because of some messy reasons not connected. The detailed process is now written to save time for those who use it later.1. Configure the environment (by default, the JDK is already

MySQL simple configuration in Linux1. Start the MySQL service command:[[Email protected] ~]# service musqld start2. Log in to the database, the default user name is root, no password. After entering MySQL, press the ENTER key to operate the database

1. View MySQL LogMysql> show global variables like '%log% '; +-----------------------------------------+-------------------------+| variable_name | Value |+-----------------------------------------+-------------------------+| Back_log | 80 | |

mysql> use MySQLERROR 1044 (42000): Access denied for user ' root ' @ ' localhost ' to database ' MySQL 'Mysql> exitBye[[Email protected] ~]# service mysqld stopStopping mysqld: [OK][Email protected] ~]#

1. See if MySQL is installedRpm-qa | Grep-i MySQL2, if there is, first uninstall, did not jump directly to the 3rd stepYum remove MySQL mysql-server mysql-libs compat-mysql51rm-rf/var/lib/mysqlrm/etc/my.cnf See if you have MySQL software:

1. Download the MySQL installation package or the green version and put it in your favorite directory.2. Configure the environment variables . Mysql_home, the value is the root directory of MYSQL; add the%mysql_home%/bin directory to path.3.

1. Error descriptionAt Org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter (onceperrequestfilter.java:125) at Org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter (proxiedfilterchain.java:66) at