done

sql/products/core.sql

@@ -0,0 +1,60 @@
+CREATE TABLE films(
+  id serial PRIMARY KEY,
+  title VARCHAR(200) NOT NULL,
+  genre VARCHAR(200) NOT NULL,
+  release_year int NOT NULL,
+  score int NOT NULL,
+  directorid serial,
+  UNIQUE(title)
+  )
+
+INSERT INTO films ( title, genre, release_year, score) VALUES ('The Shawshank Redemption', 'Drama', 1994, 9);
+INSERT INTO films ( title, genre, release_year, score) VALUES ('The Godfather', 'Crime', 1972, 9);
+INSERT INTO films ( title, genre, release_year, score) VALUES ('The Dark Knight', 'Action', 2008, 9);
+INSERT INTO films ( title, genre, release_year, score) VALUES ('Alien', 'SciFi', 1979, 9);
+INSERT INTO films ( title, genre, release_year, score) VALUES ('Total Recall', 'SciFi', 1990, 8);
+INSERT INTO films ( title, genre, release_year, score) VALUES ('The Matrix', 'SciFi', 1999, 8);
+INSERT INTO films ( title, genre, release_year, score) VALUES ('The Matrix Resurrections', 'SciFi', 2021, 5);
+INSERT INTO films ( title, genre, release_year, score) VALUES ('The Matrix Reloaded', 'SciFi', 2003, 6);
+INSERT INTO films ( title, genre, release_year, score) VALUES ('The Hunt for Red October', 'Thriller', 1990, 7);
+INSERT INTO films ( title, genre, release_year, score) VALUES ('Misery', 'Thriller', 1990, 7);
+INSERT INTO films ( title, genre, release_year, score) VALUES ('The Power Of The Dog', 'Western', 2021, 6);
+INSERT INTO films ( title, genre, release_year, score) VALUES ('Hell or High Water', 'Western', 2016, 8);
+INSERT INTO films ( title, genre, release_year, score) VALUES ('The Good the Bad and the Ugly', 'Western', 1966, 9);
+INSERT INTO films ( title, genre, release_year, score) VALUES ('Unforgiven', 'Western', 1992, 7);
+
+
+SELECT * FROM films 
+
+SELECT * FROM films AS f ORDER BY f.score DESC
+
+SELECT * FROM films AS f ORDER BY f.release_year ASC
+
+SELECT * FROM films AS f WHERE f.score >=8
+
+SELECT * FROM films AS f WHERE f.score <=7
+
+SELECT * FROM films AS f WHERE f.release_year = 1990
+
+SELECT * FROM films AS f WHERE f.release_year < 2000
+
+SELECT * FROM films AS f WHERE f.release_year > 1990
+
+SELECT * FROM films AS f WHERE f.release_year > 1990 AND f.release_year < 2000
+
+SELECT * FROM films AS f WHERE f.genre = 'SciFi'
+
+SELECT * FROM films AS f WHERE f.genre = 'SciFi' OR f.genre = 'Western'
+
+SELECT * FROM films AS f WHERE f.genre != 'SciFi' 
+
+SELECT * FROM films AS f WHERE f.genre = 'Western' AND f.release_year < 2000
+
+SELECT * FROM films AS f WHERE f.title LIKE '%Matrix%'
+
+
+SELECT AVG(films.score) FROM films
+
+SELECT COUNT(films.title) FROM films
+
+SELECT films.genre, AVG(films.score) AS average_score FROM films GROUP BY films.genre

sql/products/extension.sql

@@ -0,0 +1,23 @@
+SELECT AVG(films.score) FROM films
+
+SELECT COUNT(films.title) FROM films
+
+SELECT films.genre, AVG(films.score) AS average_score FROM films GROUP BY films.genre
+CREATE TABLE directors (
+  id serial PRIMARY KEY,
+  name VARCHAR(200) NOT NULL,
+  film_count int NOT NULL
+);
+
+INSERT INTO directors (name,film_count) VALUES ('Christopher Nolan',10);
+INSERT INTO directors (name,film_count) VALUES ('Steven Spielberg',3);
+INSERT INTO directors (name,film_count) VALUES ('Quentin Tarantino',8);
+INSERT INTO directors (name,film_count) VALUES ('Martin Scorsese',1);
+INSERT INTO directors (name,film_count) VALUES ('Ridley Scott',45);
+
+SELECT films.title, directors.name
+FROM films
+INNER JOIN directors ON films.directorid = directors.directorid;
+
+SELECT directors.name, directors.film_count
+FROM directors