From 7b65c535bfb3f0697abc5b8be8d9f93f99d0ee60 Mon Sep 17 00:00:00 2001
From: alainn-n <contato.alain@gmail.com>
Date: Thu, 23 Jun 2022 23:40:43 -0300
Subject: [PATCH] =?UTF-8?q?Entrega=20Exercicios=20Aula=20-=20Rela=C3=A7?=
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+## Ex 1
+A) Campo que estabelece o relacionamento entre duas tabelas.
+
+B) CREATE TABLE rating (
+		id VARCHAR(255) PRIMARY KEY,
+    comment TEXT NOT NULL,
+		rate FLOAT NOT NULL,
+    movie_id VARCHAR(255),
+    FOREIGN KEY (movie_id) REFERENCES movie(id)
+);
+INSERT INTO rating (id, comment, rate, movie_id) 
+VALUES (
+		"001",
+    "Muito Ruim!",
+    1,
+		"001"
+);
+INSERT INTO rating (id, comment, rate, movie_id) 
+VALUES (
+		"002",
+    "Muito Ruim!",
+    1,
+		"002"
+);
+INSERT INTO rating (id, comment, rate, movie_id) 
+VALUES (
+		"003",
+    "Muito Ruim!",
+    1,
+		"003"
+);
+INSERT INTO rating (id, comment, rate, movie_id) 
+VALUES (
+		"004",
+    "Muito Ruim!",
+    1,
+		"004"
+);
+INSERT INTO rating (id, comment, rate, movie_id) 
+VALUES (
+		"005",
+    "Muito Ruim!",
+    1,
+		"005"
+);
+
+c) Cannot add or update a child row: a foreign key constraint fails
+Não é possível adicionar ou 'atualizar' um elemento filho;
+
+D) ALTER TABLE movie DROP COLUMN rating;
+
+E) Cannot delete or update a parent row: a foreign key constraint fails 
+Não é possível deletar ou 'atualizar' um banco de dados parente;
+
+
+## Ex 2
+A) A ttabela relaciona o Ator (Actor) com o filme (Movie)
+
+B) CREATE TABLE movieCast (
+		movie_id VARCHAR(255),
+		actor_id VARCHAR(255),
+    FOREIGN KEY (movie_id) REFERENCES movie(id),
+    FOREIGN KEY (actor_id) REFERENCES actor(id)
+);
+INSERT INTO movieCast(movie_id, actor_id)
+VALUES(
+		"001",
+    "001"
+);
+INSERT INTO movieCast(movie_id, actor_id)
+VALUES(
+		"001",
+    "002"
+);
+INSERT INTO movieCast(movie_id, actor_id)
+VALUES(
+		"002",
+    "004"
+);
+INSERT INTO movieCast(movie_id, actor_id)
+VALUES(
+		"003",
+    "007"
+);
+INSERT INTO movieCast(movie_id, actor_id)
+VALUES(
+		"004",
+    "001"
+);
+INSERT INTO movieCast(movie_id, actor_id)
+VALUES(
+		"004",
+    "005"
+);
+INSERT INTO movieCast(movie_id, actor_id)
+VALUES(
+		"005",
+    "020"
+);
+
+C) Cannot add or update a child row: a foreign key constraint fails
+Não é possível adicionar ou 'atualizar' um elemento filho;
+
+D) ALTER TABLE movie DROP COLUMN rating;
+
+E) Cannot delete or update a parent row: a foreign key constraint fails 
+Não é possível deletar um elemento de outro banco e dados.
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