diff --git a/DER_DDL/DER.png b/DER_DDL/DER.png
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diff --git a/DER_DDL/db.sql b/DER_DDL/db.sql
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+++ b/DER_DDL/db.sql
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+/*
+SQLyog Enterprise v12.4.1 (64 bit)
+MySQL - 10.1.21-MariaDB : Database - desafio_celso
+*********************************************************************
+*/
+
+/*!40101 SET NAMES utf8 */;
+
+/*!40101 SET SQL_MODE=''*/;
+
+/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
+/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
+/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
+/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
+CREATE DATABASE /*!32312 IF NOT EXISTS*/`desafio_celso` /*!40100 DEFAULT CHARACTER SET latin1 */;
+
+USE `desafio_celso`;
+
+/*Table structure for table `cursos` */
+
+DROP TABLE IF EXISTS `cursos`;
+
+CREATE TABLE `cursos` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `nome` varchar(255) NOT NULL,
+  `descricao` text,
+  `data_criacao` datetime NOT NULL,
+  `data_atualizacao` datetime DEFAULT NULL,
+  `usuario_id` int(11) NOT NULL COMMENT 'Usuario que fez cadastro',
+  PRIMARY KEY (`id`),
+  KEY `fk_usuario_c` (`usuario_id`),
+  CONSTRAINT `fk_usuario_c` FOREIGN KEY (`usuario_id`) REFERENCES `usuarios` (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+
+/*Data for the table `cursos` */
+
+/*Table structure for table `cursos_detalhes` */
+
+DROP TABLE IF EXISTS `cursos_detalhes`;
+
+CREATE TABLE `cursos_detalhes` (
+  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
+  `curso_id` int(11) NOT NULL,
+  `sala_id` int(11) NOT NULL,
+  `professor_id` int(11) NOT NULL,
+  `data_criacao` datetime NOT NULL,
+  `usuario_id` int(11) NOT NULL COMMENT 'Usuario que fez cadastro',
+  PRIMARY KEY (`id`),
+  KEY `fk_curso` (`curso_id`),
+  KEY `fk_sala` (`sala_id`),
+  KEY `fk_professor` (`professor_id`),
+  KEY `fk_usuario_d` (`usuario_id`),
+  CONSTRAINT `fk_curso` FOREIGN KEY (`curso_id`) REFERENCES `cursos` (`id`),
+  CONSTRAINT `fk_professor` FOREIGN KEY (`professor_id`) REFERENCES `professores` (`id`),
+  CONSTRAINT `fk_sala` FOREIGN KEY (`sala_id`) REFERENCES `salas` (`id`),
+  CONSTRAINT `fk_usuario_d` FOREIGN KEY (`usuario_id`) REFERENCES `usuarios` (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+
+/*Data for the table `cursos_detalhes` */
+
+/*Table structure for table `professores` */
+
+DROP TABLE IF EXISTS `professores`;
+
+CREATE TABLE `professores` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `nome` varchar(255) NOT NULL,
+  `data_criacao` datetime NOT NULL,
+  `data_atualizacao` datetime DEFAULT NULL,
+  `usuario_id` int(11) NOT NULL COMMENT 'Usuario que fez cadastro',
+  PRIMARY KEY (`id`),
+  KEY `fk_usuario_p` (`usuario_id`),
+  CONSTRAINT `fk_usuario_p` FOREIGN KEY (`usuario_id`) REFERENCES `usuarios` (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+
+/*Data for the table `professores` */
+
+/*Table structure for table `salas` */
+
+DROP TABLE IF EXISTS `salas`;
+
+CREATE TABLE `salas` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `nome` varchar(255) NOT NULL,
+  `data_criacao` datetime NOT NULL,
+  `data_atualizacao` datetime DEFAULT NULL,
+  `usuario_id` int(11) NOT NULL COMMENT 'Usuario que fez cadastro',
+  PRIMARY KEY (`id`),
+  KEY `fk_usuario_s` (`usuario_id`),
+  CONSTRAINT `fk_usuario_s` FOREIGN KEY (`usuario_id`) REFERENCES `usuarios` (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+
+/*Data for the table `salas` */
+
+/*Table structure for table `usuarios` */
+
+DROP TABLE IF EXISTS `usuarios`;
+
+CREATE TABLE `usuarios` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `nome` varchar(100) NOT NULL,
+  `email` varchar(100) NOT NULL,
+  `senha` varchar(100) NOT NULL,
+  `data_criacao` datetime NOT NULL,
+  `data_atualizacao` datetime DEFAULT NULL,
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+
+/*Data for the table `usuarios` */
+
+/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
+/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
+/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
+/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;