How to design the user table structure of the mall in MySQL?

How to design the user table structure of the mall in MySQL?

When designing the user table structure of a mall system, the storage and management of user information need to be considered. A user table should be designed to be flexible and extensible enough to accommodate possible future changes. The following is an example of a basic mall user table structure design.

CREATE TABLE `user` (
  `id` INT UNSIGNED AUTO_INCREMENT NOT NULL COMMENT '用户ID',
  `username` VARCHAR(20) NOT NULL COMMENT '用户名',
  `password` VARCHAR(255) NOT NULL COMMENT '密码',
  `email` VARCHAR(255) NOT NULL COMMENT '邮箱',
  `phone` VARCHAR(20) NOT NULL COMMENT '手机号码',
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
  PRIMARY KEY (`id`),
  UNIQUE KEY `username_UNIQUE` (`username`),
  UNIQUE KEY `email_UNIQUE` (`email`),
  UNIQUE KEY `phone_UNIQUE` (`phone`)
) ENGINE=InnoDB CHARSET=utf8mb4 COMMENT='用户表';

In the above example, the user table contains the following fields:

• id: The user’s unique identifier, using Add integer type as primary key.
• username: Username, in string type, with a length limit of 20 characters.
• password: User password, in string type, with a length limit of 255 characters. In real projects, passwords can be hashed for added security.
• email: The user’s email address, in string type, with a length limit of 255 characters. When designing the user table, you can usually set the email address as a unique key to prevent repeated registration.
• phone: The user’s mobile phone number, using string type, with a length limit of 20 characters. Similarly, the mobile phone number can also be set as a unique key to avoid repeated registration.
• created_at: User creation time, using TIMESTAMP type, set to automatically record the current time.
• updated_at: The last update time of user information, using the TIMESTAMP type, set to automatically record the current time when updating.

In actual development, the above fields are only examples. Depending on the specific needs of the project, other fields may need to be added, such as gender, birthday, etc.

In addition, when designing the user table, you can consider using foreign keys to associate other related tables, such as user address table, user order table, etc. This allows for better management and query of user-related information.

When designing the user table structure of the mall, you also need to pay attention to the following points:

1. Uniqueness verification of username, email and mobile phone number: ensure that each user’s username , email address and mobile phone number are all unique to prevent repeated registration.
2. Password storage and encryption: In the mall system, user passwords need to be securely encrypted and stored. What is stored in the database is hashed passwords instead of plain text passwords.
3. Optimization of database index: Properly adding indexes can improve query efficiency. In the user table, you can add indexes for some common fields according to specific query requirements, such as user name, email, mobile phone number, etc.
4. Selection of database table engine: Based on needs and characteristics, you can choose an appropriate database table engine, such as InnoDB, MyISAM, etc., to meet business needs and performance requirements.

In summary, when designing the mall user table structure, you need to fully consider the storage and management of user information, and reasonably select and design fields, indexes, and table relationships based on actual needs. Only reasonable table structure design can ensure the scalability and maintainability of the system.

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