How to design an extensible MySQL table structure to implement social sharing functionality?

How to design an extensible MySQL table structure to implement social sharing function?

With the rise of social networks, social sharing functions have become standard features of many applications. In order to achieve social sharing among users, the design of the database becomes crucial. This article will introduce how to design an extensible MySQL table structure to implement social sharing functions and provide specific code examples.

1. User table

First, we need to create a user table to store the user's basic information, such as user name, password, email, etc. The user table can be created using the following SQL statement:

CREATE TABLE `user` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `username` VARCHAR(50) NOT NULL,
  `password` VARCHAR(50) NOT NULL,
  `email` VARCHAR(50) NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `username` (`username`),
  UNIQUE KEY `email` (`email`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

2. Share table

Next, we need to create a share table to store the user's shared content. The share table can be created using the following SQL statement:

CREATE TABLE `share` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `user_id` INT(11) NOT NULL,
  `content` TEXT NOT NULL,
  `created_at` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  CONSTRAINT `fk_user_id` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

In the share table, we use foreign key constraints to ensure that each share belongs to a specific user, and when the user is deleted, the related shares also Will be deleted.

3. Like table (Like table)

In order to implement the like function, we need to create a like table to store the user's likes on the share. The likes table can be created using the following SQL statement:

CREATE TABLE `like` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `user_id` INT(11) NOT NULL,
  `share_id` INT(11) NOT NULL,
  `created_at` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  CONSTRAINT `fk_like_user_id` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
  CONSTRAINT `fk_like_share_id` FOREIGN KEY (`share_id`) REFERENCES `share` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

In the likes table, we also use foreign key constraints to ensure that each like belongs to a specific user and share, and when the user or share When deleted, the related likes will also be deleted.

4. Comment table

Finally, we need to create a comment table to store user comments on sharing. The comments table can be created using the following SQL statement:

CREATE TABLE `comment` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `user_id` INT(11) NOT NULL,
  `share_id` INT(11) NOT NULL,
  `content` TEXT NOT NULL,
  `created_at` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  CONSTRAINT `fk_comment_user_id` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
  CONSTRAINT `fk_comment_share_id` FOREIGN KEY (`share_id`) REFERENCES `share` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

In the comments table, we also use foreign key constraints to ensure that each comment belongs to a specific user and share, and when the user or share is deleted , related comments will also be deleted.

Through the above table structure design, we have implemented the basic social sharing function. Users can register an account and log in to the system to share content, like and comment. At the same time, our table structure is extensible, and more function tables can be added according to needs, such as follow tables, favorite tables, etc.

I hope this article will help you understand how to design an extensible MySQL table structure to implement social sharing functions. Through reasonable table design, we can efficiently store and manage social data between users.

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