MySQL Problema 3

-- MySQL Workbench Forward Engineering

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,ALLOW_INVALID_DATES';

-- -----------------------------------------------------
-- Schema problema3
-- -----------------------------------------------------

-- -----------------------------------------------------
-- Schema problema3
-- -----------------------------------------------------
CREATE SCHEMA IF NOT EXISTS `problema3` DEFAULT CHARACTER SET utf8 ;
USE `problema3` ;

-- -----------------------------------------------------
-- Table `problema3`.`Peces`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `problema3`.`Peces` (
  `Codi` INT NOT NULL,
  `Nom` VARCHAR(100) NULL,
  PRIMARY KEY (`Codi`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `problema3`.`Proveidors`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `problema3`.`Proveidors` (
  `Id` CHAR(4) NOT NULL,
  `Nom` VARCHAR(100) NULL,
  PRIMARY KEY (`Id`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `problema3`.`Subministra`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `problema3`.`Subministra` (
  `CodiPeca` INT NOT NULL,
  `IdProveidor` CHAR(4) NOT NULL,
  `Preu` INT NULL,
  PRIMARY KEY (`CodiPeca`, `IdProveidor`),
  INDEX `IdProveidor_idx` (`IdProveidor` ASC),
  CONSTRAINT `CodiPeca`
    FOREIGN KEY (`CodiPeca`)
    REFERENCES `problema3`.`Peces` (`Codi`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `IdProveidor`
    FOREIGN KEY (`IdProveidor`)
    REFERENCES `problema3`.`Proveidors` (`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;