博客 / CMS 数据库表结构设计

别叫我老干部2026-06-10 13:40

大多数博客和 CMS 平台背后的标准内容模型。文章归属于作者和分类，通过关联表携带多个标签，并收集层级评论

表结构（SQL）

sql 复制代码

CREATE TABLE users (
  id INT PRIMARY KEY AUTO_INCREMENT,
  username VARCHAR(50) NOT NULL UNIQUE,
  email VARCHAR(254) NOT NULL UNIQUE,
  display_name VARCHAR(120),
  created_at DATETIME NOT NULL
);

CREATE TABLE categories (
  id INT PRIMARY KEY AUTO_INCREMENT,
  name VARCHAR(100) NOT NULL,
  slug VARCHAR(120) NOT NULL UNIQUE
);

CREATE TABLE posts (
  id INT PRIMARY KEY AUTO_INCREMENT,
  author_id INT NOT NULL,
  category_id INT,
  title VARCHAR(200) NOT NULL,
  slug VARCHAR(220) NOT NULL UNIQUE,
  body TEXT NOT NULL,
  status VARCHAR(20) NOT NULL,
  published_at DATETIME,
  FOREIGN KEY (author_id) REFERENCES users(id),
  FOREIGN KEY (category_id) REFERENCES categories(id)
);

CREATE TABLE tags (
  id INT PRIMARY KEY AUTO_INCREMENT,
  name VARCHAR(60) NOT NULL UNIQUE
);

CREATE TABLE post_tags (
  post_id INT NOT NULL,
  tag_id INT NOT NULL,
  PRIMARY KEY (post_id, tag_id),
  FOREIGN KEY (post_id) REFERENCES posts(id),
  FOREIGN KEY (tag_id) REFERENCES tags(id)
);

CREATE TABLE comments (
  id INT PRIMARY KEY AUTO_INCREMENT,
  post_id INT NOT NULL,
  author_id INT,
  parent_id INT,
  body TEXT NOT NULL,
  created_at DATETIME NOT NULL,
  FOREIGN KEY (post_id) REFERENCES posts(id),
  FOREIGN KEY (author_id) REFERENCES users(id),
  FOREIGN KEY (parent_id) REFERENCES comments(id)
);

查看erdiagram在线可视化展示