聊天的DB模式?

问题描述：

我需要将聊天对话存储在数据库模式中.我使用该数据库的方式是在网站上发布聊天记录.每次聊天最多不会超过20个回复.有人可以为此提出建议吗?

I need to store chat conversations in a database schema. The way I would use this database is I would post chats on a website. Each chat would not be more than about 20 responses. Can someone please suggest a schema for this?

答

这是开始使用 MySQL Workbench

ERD的PNG导出

还有创建脚本

SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;
SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='TRADITIONAL';

CREATE SCHEMA IF NOT EXISTS `chats` DEFAULT CHARACTER SET utf8 COLLATE default collation ;

-- -----------------------------------------------------
-- Table `chats`.`chat`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `chats`.`chat` (
  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT ,
  PRIMARY KEY (`id`) )
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `chats`.`chat_user`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `chats`.`chat_user` (
  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT ,
  `handle` VARCHAR(45) NOT NULL ,
  PRIMARY KEY (`id`) )
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `chats`.`chat_line`
-- -----------------------------------------------------
CREATE  TABLE IF NOT EXISTS `chats`.`chat_line` (
  `id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT ,
  `chat_id` INT UNSIGNED NOT NULL ,
  `user_id` INT UNSIGNED NOT NULL ,
  `line_text` TEXT NOT NULL ,
  `created_at` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ,
  PRIMARY KEY (`id`) ,
  INDEX `fk_chat_line_chat` (`chat_id` ASC) ,
  INDEX `fk_chat_line_chat_user1` (`user_id` ASC) ,
  CONSTRAINT `fk_chat_line_chat`
    FOREIGN KEY (`chat_id` )
    REFERENCES `chats`.`chat` (`id` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_chat_line_chat_user1`
    FOREIGN KEY (`user_id` )
    REFERENCES `chats`.`chat_user` (`id` )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;



SET SQL_MODE=@OLD_SQL_MODE;
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;

也欢迎您从我的保管箱下载MWB文件.

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