First, basic usage
1. Add Column
ALTER TABLE Tbl_name add col_name type
For example, add a column of weight to the pet table,
Mysql>alter table Pet Add weight int;
2. Delete Column
ALTER TABLE Tbl_name drop col_
Install MySQL1. Download the MySQL Installation FileThe following two files are required to install MYSQL:
MySQL-server-5.1.7-0.i386.rpm To: http://dev.mysql.com/downloads/mysql/5.1.html, open this webpage and click"Linux x86 generic RPM
This article describes in detail the user password expiration function of MySQL. For more information, see
Payment Card IndustryThat is, the payment card industry. the PCI industry represents debit cards, credit cards, pre-payment cards, e-wallets,
MySQL user password expiration function detailsMySQL user password expiration function details
Two terms are described first.
Payment Card IndustryThat is, the payment card industry. The PCI industry represents debit cards, credit cards, pre-payment
Set Change root passwordNote: How to change the root password, about the root user is the MySQL Super administrator user, it is similar to the root user inside the Linux operating system, to distinguish between the root of MySQL and the system root
MySQL常用指令,java,php程序员,数据库工程师必备。程序员小冰常用资料整理MySQL common commands (for reference)The most common display commands are:1. Display the list of databases.show databases;2. Display the data table in the library:Use MySQL;Show tables;3, display the
User Rights Management mainly has the following functions:1. You can restrict which libraries a user accesses, which tables2. You can restrict which tables the user performs for select, CREATE, delete, delete, alter, etc.3. The IP or domain name
Today installed on the Mac MySQL 5.7, after starting the service, enter Mysql-u root-p, enter the initial password, try to execute show databases;reported a you must reset your password using the ALTER USER statement before executing this statement.
MySQLStudy-MySQL User and permission management MySQL server uses the MySQL permission table to control user access to the database. the MySQL permission table is stored in the mysql database and initialized by the mysql_install_db script. These
Han Ligang Teacher Video teaching website http://www.91xueit.comMr. Han QQ458717185No. 01. mysql User and Rights managementMySQL permissions control is controlled by two steps, can not connect (authenticate user identity), what action (verify user
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