Guia para projetar banco de dados para pesquisa e pesquisa no MySQL

Banco de dados de pesquisa

CREATE SCHEMA `poll` DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

Tabela de usuário

CREATE TABLE `poll`.`user` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `firstName` VARCHAR(50) NULL DEFAULT NULL,
  `middleName` VARCHAR(50) NULL DEFAULT NULL,
  `lastName` VARCHAR(50) NULL DEFAULT NULL,
  `mobile` VARCHAR(15) NULL,
  `email` VARCHAR(50) NULL,
  `passwordHash` VARCHAR(32) NOT NULL,
  `host` TINYINT(1) NOT NULL DEFAULT 0,
  `registeredAt` DATETIME NOT NULL,
  `lastLogin` DATETIME NULL DEFAULT NULL,
  `intro` TINYTEXT NULL DEFAULT NULL,
  `profile` TEXT NULL DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE INDEX `uq_mobile` (`mobile` ASC),
  UNIQUE INDEX `uq_email` (`email` ASC) );

Tabela de Enquete

CREATE TABLE `poll`.`poll` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `hostId` BIGINT NOT NULL,
  `title` VARCHAR(75) NOT NULL,
  `metaTitle` VARCHAR(100) NULL,
  `slug` VARCHAR(100) NOT NULL,
  `summary` TINYTEXT NULL,
  `type` SMALLINT(6) NOT NULL DEFAULT 0,
  `published` TINYINT(1) NOT NULL DEFAULT 0,
  `createdAt` DATETIME NOT NULL,
  `updatedAt` DATETIME NULL DEFAULT NULL,
  `publishedAt` DATETIME NULL DEFAULT NULL,
  `startsAt` DATETIME NULL DEFAULT NULL,
  `endsAt` DATETIME NULL DEFAULT NULL,
  `content` TEXT NULL DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE INDEX `uq_slug` (`slug` ASC),
  INDEX `idx_poll_host` (`hostId` ASC),
  CONSTRAINT `fk_poll_host`
    FOREIGN KEY (`hostId`)
    REFERENCES `poll`.`user` (`id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION);

Meta de enquete

CREATE TABLE `poll`.`poll_meta` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `pollId` BIGINT NOT NULL,
  `key` VARCHAR(50) NOT NULL,
  `content` TEXT NULL DEFAULT NULL,
  PRIMARY KEY (`id`),
  INDEX `idx_meta_poll` (`pollId` ASC),
  UNIQUE INDEX `uq_poll_meta` (`pollId` ASC, `key` ASC),
  CONSTRAINT `fk_meta_poll`
    FOREIGN KEY (`pollId`)
    REFERENCES `poll`.`poll` (`id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;

Tabela de perguntas da enquete

CREATE TABLE `poll`.`poll_question` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `pollId` BIGINT NOT NULL,
  `type` VARCHAR(50) NOT NULL,
  `active` TINYINT(1) NOT NULL DEFAULT 0,
  `createdAt` DATETIME NOT NULL,
  `updatedAt` DATETIME NULL DEFAULT NULL,
  `content` TEXT NULL DEFAULT NULL,
  PRIMARY KEY (`id`),
  INDEX `idx_question_poll` (`pollId` ASC),
  CONSTRAINT `fk_question_poll`
    FOREIGN KEY (`pollId`)
    REFERENCES `poll`.`poll` (`id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;

Tabela de respostas da pesquisa

CREATE TABLE `poll`.`poll_answer` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `pollId` BIGINT NOT NULL,
  `questionId` BIGINT NOT NULL,
  `active` TINYINT(1) NOT NULL DEFAULT 0,
  `createdAt` DATETIME NOT NULL,
  `updatedAt` DATETIME NULL DEFAULT NULL,
  `content` TEXT NULL DEFAULT NULL,
  PRIMARY KEY (`id`),
  INDEX `idx_answer_poll` (`pollId` ASC),
  CONSTRAINT `fk_answer_poll`
    FOREIGN KEY (`pollId`)
    REFERENCES `poll`.`poll` (`id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;

ALTER TABLE `poll`.`poll_answer` 
ADD INDEX `idx_answer_question` (`questionId` ASC);
ALTER TABLE `poll`.`poll_answer` 
ADD CONSTRAINT `fk_answer_question`
  FOREIGN KEY (`questionId`)
  REFERENCES `poll`.`poll_question` (`id`)
  ON DELETE NO ACTION
  ON UPDATE NO ACTION;

Tabela de votação da enquete

CREATE TABLE `poll`.`poll_vote` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `pollId` BIGINT NOT NULL,
  `questionId` BIGINT NOT NULL,
  `answerId` BIGINT DEFAULT NULL,
  `userId` BIGINT NOT NULL,
  `createdAt` DATETIME NOT NULL,
  `updatedAt` DATETIME NULL DEFAULT NULL,
  `content` TEXT NULL DEFAULT NULL,
  PRIMARY KEY (`id`),
  INDEX `idx_vote_poll` (`pollId` ASC),
  CONSTRAINT `fk_vote_poll`
    FOREIGN KEY (`pollId`)
    REFERENCES `poll`.`poll` (`id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;

ALTER TABLE `poll`.`poll_vote` 
ADD INDEX `idx_vote_question` (`questionId` ASC);
ALTER TABLE `poll`.`poll_vote` 
ADD CONSTRAINT `fk_vote_question`
  FOREIGN KEY (`questionId`)
  REFERENCES `poll`.`poll_question` (`id`)
  ON DELETE NO ACTION
  ON UPDATE NO ACTION;

ALTER TABLE `poll`.`poll_vote` 
ADD INDEX `idx_vote_answer` (`answerId` ASC);
ALTER TABLE `poll`.`poll_vote` 
ADD CONSTRAINT `fk_vote_answer`
  FOREIGN KEY (`answerId`)
  REFERENCES `poll`.`poll_answer` (`id`)
  ON DELETE NO ACTION
  ON UPDATE NO ACTION;

ALTER TABLE `poll`.`poll_vote` 
ADD INDEX `idx_vote_user` (`userId` ASC);
ALTER TABLE `poll`.`poll_vote` 
ADD CONSTRAINT `fk_vote_user`
  FOREIGN KEY (`userId`)
  REFERENCES `poll`.`user` (`id`)
  ON DELETE NO ACTION
  ON UPDATE NO ACTION;

Tabela de categorias e Tabela de categorias de pesquisa

CREATE TABLE `poll`.`category` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `parentId` BIGINT NULL DEFAULT NULL,
  `title` VARCHAR(75) NOT NULL,
  `metaTitle` VARCHAR(100) NULL DEFAULT NULL,
  `slug` VARCHAR(100) NOT NULL,
  `content` TEXT NULL DEFAULT NULL,
  PRIMARY KEY (`id`));

ALTER TABLE `poll`.`category` 
ADD INDEX `idx_category_parent` (`parentId` ASC);
ALTER TABLE `poll`.`category` 
ADD CONSTRAINT `fk_category_parent`
  FOREIGN KEY (`parentId`)
  REFERENCES `poll`.`category` (`id`)
  ON DELETE NO ACTION
  ON UPDATE NO ACTION;

CREATE TABLE `poll`.`poll_category` (
  `pollId` BIGINT NOT NULL,
  `categoryId` BIGINT NOT NULL,
  PRIMARY KEY (`pollId`, `categoryId`),
  INDEX `idx_pc_category` (`categoryId` ASC),
  INDEX `idx_pc_poll` (`pollId` ASC),
  CONSTRAINT `fk_pc_poll`
    FOREIGN KEY (`pollId`)
    REFERENCES `poll`.`poll` (`id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_pc_category`
    FOREIGN KEY (`categoryId`)
    REFERENCES `poll`.`category` (`id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION);

Tabela de Tags e Tabela de Tags de Enquete

• A coluna parentId não é obrigatória na Tabela de tags.
• A contagem de categorias permanece baixa, pois elas podem ser usadas para formar o menu principal para fins de navegação. As tags podem ser mais do que categorias.
• Tanto as categorias quanto as tags podem ser usadas para relacionar as enquetes.
• Deve-se atribuir apenas algumas categorias a uma enquete, enquanto a contagem de tags pode ser maior.

Resumo