Home Database Mysql Tutorial MySQL创建用户的三种方法

MySQL创建用户的三种方法

Jun 07, 2016 pm 04:43 PM
o database

mysql创建用户的方法分成三种:INSERT USER表的方法、CREATE USER的方法、GRANT的方法。

前言:mysql创建用户的方法分成三种:INSERT USER表的方法、CREATE USER的方法、GRANT的方法。

一、账号名称的构成方式

账号的组成方式:用户名+主机(所以可以出现重复的用户名,跟其他的数据库不一样)

用户名:16字符以内.

主机名:可以用主机名和IP地址,,也可以用通配符

通配符说明:172.18.10.%(IP地址为172.18.10段的所有IP地址都可以访问)

二、通过CREATE USER命令进行创建用户

脚本:CREATE USER 'username'@'host' [IDENTIFIED BY 'PASSWORD'] 其中密码是可选项;

例子:CREATE USER 'john'@'192.168.189.71' IDENTIFIED BY "123";

CREATE USER 'john'@'192.168.189.%' IDENTIFIED BY "123";

CREATE USER 'john'@' %' ;

说明:该方法创建出来的用户只有连接数据库的权限,需要后续继续授权;

三、通过GRANT命令创建用户

个人习惯一般用这种方法进行创建用户,当数据库存在用户的时候GRANT会对用户进行授权,但当数据库不存在该用户的时候,就会创建相应的用户并进行授权。(说明上面那步是多余的)

脚本:

GRANT ON

[object] [IDENTIFIED BY 'password']

[WITH GRANT OPTION];

MAX_QUERIES_PER_HOUR count

MAX_UPDATES_PER_HOUR count

MAX_CONNECTIONS_PER_HOUR count

MAX_USER_CONNECTIONS count

说明:priv代表权限select,insert,update,delete,create,drop,index,alter,grant,references,reload,shutdown,process,file等14个权限

例子:mysql>grant select,insert,update,delete,create,drop on test.hr to john@192.168.10.1 identified by '123';

说明:给主机为192.168.10.1的用户john分配可对数据库test的hr表进行select,insert,update,delete,create,drop等操作的权限,并设定口令为123。

mysql>grant all privileges on test.* to joe@192.168.10.1 identified by '123';

说明:给主机为192.168.10.1的用户john分配可对数据库test所有表进行所有操作的权限,并设定口令为123。

mysql>grant all privileges on *.* to john@192.168.10.1 identified by '123';

说明:给主机为192.168.10.1的用户john分配可对所有数据库的所有表进行所有操作的权限,并设定口令为123。

mysql>grant all privileges on *.* to john@localhost identified by '123';

说明:用户john分配可对所有数据库的所有表进行所有操作的权限,并设定口令为123。

四、直接向mysql.user表插入记录(该方法个人很少用)

因为数据库的用户信息都是保存在mysql.user这张表的,所以直接对该表进行插入语句,即可完成用户的创建;

mysql> insert into user (host,user,password) values ('%','john',password('123'));

五、完成用户的创建后,请记得刷新系统权限表;

mysql>flush privileges;

总结:虽然创建用户的方法有三种,个人还是倾向于第二种方法,一步到位,简单明了;

其他的两种方法只是有助于理解数据库的原理而已;

--------------------------------------分割线 --------------------------------------

Ubuntu 14.04下安装MySQL

《MySQL权威指南(原书第2版)》清晰中文扫描版 PDF

Ubuntu 14.04 LTS 安装 LNMP Nginx\PHP5 (PHP-FPM)\MySQL

Ubuntu 14.04下搭建MySQL主从服务器

Ubuntu 12.04 LTS 构建高可用分布式 MySQL 集群

Ubuntu 12.04下源代码安装MySQL5.6以及Python-MySQLdb

MySQL-5.5.38通用二进制安装

--------------------------------------分割线 --------------------------------------

本文永久更新链接地址:

linux

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Detailed tutorial on establishing a database connection using MySQLi in PHP Detailed tutorial on establishing a database connection using MySQLi in PHP Jun 04, 2024 pm 01:42 PM

How to use MySQLi to establish a database connection in PHP: Include MySQLi extension (require_once) Create connection function (functionconnect_to_db) Call connection function ($conn=connect_to_db()) Execute query ($result=$conn->query()) Close connection ( $conn->close())

iOS 18 adds a new 'Recovered' album function to retrieve lost or damaged photos iOS 18 adds a new 'Recovered' album function to retrieve lost or damaged photos Jul 18, 2024 am 05:48 AM

Apple's latest releases of iOS18, iPadOS18 and macOS Sequoia systems have added an important feature to the Photos application, designed to help users easily recover photos and videos lost or damaged due to various reasons. The new feature introduces an album called "Recovered" in the Tools section of the Photos app that will automatically appear when a user has pictures or videos on their device that are not part of their photo library. The emergence of the "Recovered" album provides a solution for photos and videos lost due to database corruption, the camera application not saving to the photo library correctly, or a third-party application managing the photo library. Users only need a few simple steps

How to handle database connection errors in PHP How to handle database connection errors in PHP Jun 05, 2024 pm 02:16 PM

To handle database connection errors in PHP, you can use the following steps: Use mysqli_connect_errno() to obtain the error code. Use mysqli_connect_error() to get the error message. By capturing and logging these error messages, database connection issues can be easily identified and resolved, ensuring the smooth running of your application.

How does Go WebSocket integrate with databases? How does Go WebSocket integrate with databases? Jun 05, 2024 pm 03:18 PM

How to integrate GoWebSocket with a database: Set up a database connection: Use the database/sql package to connect to the database. Store WebSocket messages to the database: Use the INSERT statement to insert the message into the database. Retrieve WebSocket messages from the database: Use the SELECT statement to retrieve messages from the database.

How to use database callback functions in Golang? How to use database callback functions in Golang? Jun 03, 2024 pm 02:20 PM

Using the database callback function in Golang can achieve: executing custom code after the specified database operation is completed. Add custom behavior through separate functions without writing additional code. Callback functions are available for insert, update, delete, and query operations. You must use the sql.Exec, sql.QueryRow, or sql.Query function to use the callback function.

How to handle database connections and operations using C++? How to handle database connections and operations using C++? Jun 01, 2024 pm 07:24 PM

Use the DataAccessObjects (DAO) library in C++ to connect and operate the database, including establishing database connections, executing SQL queries, inserting new records and updating existing records. The specific steps are: 1. Include necessary library statements; 2. Open the database file; 3. Create a Recordset object to execute SQL queries or manipulate data; 4. Traverse the results or update records according to specific needs.

Top 10 global digital currency trading apps recommended (2025 currency trading software ranking) Top 10 global digital currency trading apps recommended (2025 currency trading software ranking) Mar 12, 2025 pm 05:48 PM

This article recommends the top ten digital currency trading apps in the world, including Binance, OKX, Huobi Global, Coinbase, Kraken, Gate.io, KuCoin, Bitfinex, Gemini and Bitstamp. These platforms have their own characteristics in terms of transaction pair quantity, transaction speed, security, compliance, user experience, etc. For example, Binance is known for its high transaction speed and extensive services, while Coinbase is more suitable for novices. Choosing a platform that suits you requires comprehensive consideration of your own needs and risk tolerance. Learn about the world's mainstream digital currency trading platforms to help you conduct digital asset trading safely and efficiently.

How to install and register the btc trading app? How to install and register the btc trading app? Feb 21, 2025 pm 07:09 PM

This article will provide a detailed introduction to how to install and register a Bitcoin trading application. The Bitcoin trading app allows users to manage and trade cryptocurrencies such as Bitcoin. The article guides users through the installation and registration process step by step, including downloading applications, creating accounts, performing identity verification, and first deposit. The goal of the article is to provide beginners with clear and easy-to-understand guidelines to help them easily enter the world of Bitcoin trading.

See all articles