MySQL

MyBatis 3.2.6 The method of obtaining the self-increment primary key at the time of insertion two takes MySQL5.5 as an example: Method 1:InsertID= "Insert"ParameterType= "Person"Usegeneratedkeys= "true"Keyproperty= "id">INSERT into person (NAME,PSWD)

In the actual development process, you may need to deploy multiple MySQL instances on a single server, it is recommended to use the official MySQL solution Mysqld_multi1. Modify MY.CNFAs a reference configuration that defines two

MySQL add user, new database, user authorization, delete user, change password (note that each line followed by A; indicates that a command statement ends):1. Create a new user Log in to MySQL: @>mysql-u root-p@> Password To

First step: Open the MYSQL command line first, through the Start menu-Program-mysql-command lines client,1-1:Figure 1-1Step two: In the command, enter use information_schema 1-2 as shown:Figure 1-2Step three: Look at the size of the specified

Delete duplicate rows1 DELETE fromecm_member_login_session2 WHERE( Number, Client_code)inch (3 SELECT Number, Client_code fromMall.ecm_member_login_sessionGROUP by Number, Client_code having COUNT(*)> 1) 4 andUpdate_time not inch (5

Database configurationBuild the database file set in the MySQL home directorymkdir data_3307mkdir data_3308mkdir data_3309Configure the database in the MySQL home directory./scirpt/mysql_install_db --datadir=/home/fanbin/code/mysql/data_3307

Parsing query statements1) explain [extended] Select Select_options2) describe (can be abbreviated as DESC) Select Select_optionsView information for a table [show create table name]When is the index useless?1) Use the like query and% at the

1. cmd into console stop MySQL serviceCommand line: net stop MySQL2. Switch to the MySQL installation under the bin directory, for example:Command line: CD G:\MySQL\MySQL Server 5.6\bin3, Execute Skip permission table limit parameters, after

MySQL is a small but powerful database, which is very popular at present. However, the official website gives the installation package in two formats, one in MSI format and one in ZIP format. Many people under the ZIP format decompression found no

Here are the easiest ways to restore root privileges and change the root password.1: Install MySQL Workbench. The visual interface operates directly.2: The bottom point of apple---system preferences, MySQL turn off MySQL service in the pop-up page3:

Install MySQL installation database with command Yum in CentOS, but run mysqld to start MySQL when you are finished, you can not find it, through Find/| grep Mysqld also did not find the directory of Mysqld, later on Google search under, just know

Numeric type tinyint      Storage Range: 128 to 127 or 0 to 255          tinyint (1) smallint     storage range: 32768 to 32767 or 0 to 65535   smallint (3) Mediumint     Storage Range:- 8388608 to 8388607 or 0 to 16777215   mediumint (5) int        

Work needs to use MySQL, installed in Linux with Yum, installation path is not controllable, it can not be customized, in order to better manage MySQL Sever, the use of source installation.MySQL 5.5.17 installation requires the use of the CMake

The MySQL manual writes: The storage engine parses the check clause, but ignores it The CHECK clause is parsed and ignored by all storage engines. The check constraint has not been found yet, but the workaround is found:Mysql>Delimiter/

2. MysqlGetting Started with databases(1) Open the services provided by the Windows system to view the appropriate services. (2) Viewing in Windows Task Manager's Process(3) Use the command line to manage the Windows Mysql database service. Net

For the database, everyone should know its importance, the information in the database can not have any problems, such as e-commerce site Server backend, security products, data backstage, and so on.Now I configure MySQL dual-machine synchronization,

1 Error descriptionAt Org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest (Invocablehandlermethod.java :) at Org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle (

Connect to SCHOOLDB using the SQL Manager management tool. Because the primary key is set for three tables, the primary key cannot be weighed in the following exercise.Inserting data1. Exercise: Insert data for all fields of a tableInsert data for

To use Django for project development recently, you need to use the Mysql-python module.In the local installation of the environment when the error occurred,unable to find Vcvarsall.batFind a lot of information on the Internet, found that the window

1. Mysqlinstallation of the database(1) Open the Mysql installation software, agree to the relevant agreement to proceed to the next installation, select "Custom" in the Select installation type to go to the next installation. (2) Select the