How to design the MySQL table structure to support the test paper generation and management of the online examination system?

How to design the MySQL table structure to support the generation and management of test papers in the online examination system?

Before designing the MySQL table structure to support test paper generation and management of the online examination system, we need to first understand the basic requirements and functions of the online examination system. Online examination systems generally include modules such as user management, test paper management, question management and examination management. This article will focus on the table structure design of test paper generation and management.

1. User Management

The user management module is used to manage user information in the system, including user ID, user name, password, role and other fields. The following is a simple user table example:

CREATE TABLE `users` (
  `id` INT(10) NOT NULL AUTO_INCREMENT,
  `username` VARCHAR(50) NOT NULL,
  `password` VARCHAR(50) NOT NULL,
  `role` ENUM('admin', 'teacher', 'student') NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `username_UNIQUE` (`username`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

2. Test paper management

The test paper management module is used to create, modify and delete test paper information. A test paper usually contains fields such as test paper ID, test paper name, total score, and creator. The following is a simple example of a test sheet:

CREATE TABLE `papers` (
  `id` INT(10) NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(100) NOT NULL,
  `total_score` FLOAT NOT NULL,
  `creator_id` INT(10) NOT NULL,
  PRIMARY KEY (`id`),
  FOREIGN KEY (`creator_id`) REFERENCES `users` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

3. Question management

The question management module is used to manage test question information, including question ID, question type, content, options, answers and points. fields. The following is a simple example of a question sheet:

CREATE TABLE `questions` (
  `id` INT(10) NOT NULL AUTO_INCREMENT,
  `paper_id` INT(10) NOT NULL,
  `type` ENUM('single_choice', 'multiple_choice', 'true_false', 'short_answer') NOT NULL,
  `content` TEXT NOT NULL,
  `options` TEXT,
  `answer` TEXT NOT NULL,
  `score` FLOAT NOT NULL,
  PRIMARY KEY (`id`),
  FOREIGN KEY (`paper_id`) REFERENCES `papers` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

4. Exam Management

The exam management module is used to allocate test papers to candidates and record the candidates' answers and scores. The following is a simple example of an examination form and answer sheet:

CREATE TABLE `exams` (
  `id` INT(10) NOT NULL AUTO_INCREMENT,
  `paper_id` INT(10) NOT NULL,
  `user_id` INT(10) NOT NULL,
  `start_time` DATETIME NOT NULL,
  `end_time` DATETIME,
  PRIMARY KEY (`id`),
  FOREIGN KEY (`paper_id`) REFERENCES `papers` (`id`),
  FOREIGN KEY (`user_id`) REFERENCES `users` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE `answers` (
  `id` INT(10) NOT NULL AUTO_INCREMENT,
  `exam_id` INT(10) NOT NULL,
  `question_id` INT(10) NOT NULL,
  `user_id` INT(10) NOT NULL,
  `answer` TEXT NOT NULL,
  PRIMARY KEY (`id`),
  FOREIGN KEY (`exam_id`) REFERENCES `exams` (`id`),
  FOREIGN KEY (`question_id`) REFERENCES `questions` (`id`),
  FOREIGN KEY (`user_id`) REFERENCES `users` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

Through the design of the above table structure, we can realize the test paper generation and management functions of the online examination system and ensure the integrity and consistency of the data. In practical applications, more complex table structure design and optimization can be carried out according to specific needs.

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