Martin Vu

sql/films/extension-2.sql

@@ -0,0 +1,50 @@
+DROP TABLE IF EXISTS directors CASCADE;
+
+CREATE TABLE directors
+(
+    id serial PRIMARY KEY,
+    name VARCHAR(255)
+);
+
+DROP TABLE IF EXISTS films;
+
+CREATE TABLE films (
+    id serial PRIMARY KEY,
+    title VARCHAR(255) NOT NULL,
+    genre VARCHAR(255),
+    release_year INT,
+    score INT,
+  	director_id INT,
+    FOREIGN KEY (director_id) REFERENCES directors(id)
+    ON DELETE SET NULL,
+    UNIQUE(title)
+);
+
+INSERT INTO directors (name) VALUES
+('Dir1'),
+('Dir2'),
+('Dir3'),
+('Dir4'),
+('Dir5'),
+('Dir6');
+
+
+INSERT INTO films (title, genre, release_year, score, director_id) VALUES 
+('The Shawshank Redemption', 'Drama', 1994, 9, 1),
+('The Godfather', 'Crime', 1972, 9, 3),
+('The Dark Knight', 'Action', 2008, 9, 5),
+('Alien', 'SciFi', 1979, 9, 2),
+('Total Recall', 'SciFi', 1990, 8, 4),
+('The Matrix', 'SciFi', 1999, 8, 6),
+('The Matrix Resurrections', 'SciFi', 2021, 5, 3),
+('The Matrix Reloaded', 'SciFi', 2003, 6, 1),
+('The Hunt for Red October', 'Thriller', 1990, 7, 5),
+('Misery', 'Thriller', 1990, 7, 2),
+('The Power Of The Dog', 'Western', 2021, 6, 6),
+('Hell or High Water', 'Western', 2016, 8, 4),
+('The Good the Bad and the Ugly', 'Western', 1966, 9, 1),
+('Unforgiven', 'Western', 1992, 7, 3);
+
+SELECT films.title, directors.name 
+FROM films
+JOIN directors ON directors.id = films.director_id; 

sql/films/extension-3.sql

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+SELECT directors.name, COUNT(films.id) 
+FROM directors 
+LEFT JOIN films ON directors.id = films.director_id
+GROUP BY directors.name;
+
+
+
+
+
+
+

sql/films/setup-films.sql

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+CREATE TABLE films(
+ id serial PRIMARY KEY,
+ title VARCHAR(255) NOT NULL,
+ genre VARCHAR(255),
+ release_year INT,
+ score INT,
+ UNIQUE(title)
+);
+
+INSERT INTO films (title, genre, release_year, score) VALUES 
+('The Shawshank Redemption', 'Drama', 1994, 9),
+('The Godfather', 'Crime', 1972, 9),
+('The Dark Knight', 'Action', 2008, 9),
+('Alien', 'SciFi', 1979, 9),
+('Total Recall', 'SciFi', 1990, 8),
+('The Matrix', 'SciFi', 1999, 8),
+('The Matrix Resurrections', 'SciFi', 2021, 5),
+('The Matrix Reloaded', 'SciFi', 2003, 6),
+('The Hunt for Red October', 'Thriller', 1990, 7),
+('Misery', 'Thriller', 1990, 7),
+('The Power Of The Dog', 'Western', 2021, 6),
+('Hell or High Water', 'Western', 2016, 8),
+('The Good the Bad and the Ugly', 'Western', 1966, 9),
+('Unforgiven', 'Western', 1992, 7);