David Loveday

day1.sql

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+-- Show all albums.
+SELECT * FROM album;
+
+-- Show all albums made between 1975 and 1990.
+SELECT * FROM album
+WHERE (release_year <= 1990)
+AND (release_year >= 1975);
+
+-- Show all albums whose names start with `Super D`.
+SELECT * FROM album
+WHERE title LIKE "Super D%";
+
+-- Show all albums that have no release year.
+SELECT * FROM album
+WHERE release_year IS NULL;
+
+
+-- Show all track titles from `Super Funky Album`.
+
+SELECT track.title FROM track,album 
+WHERE album.title = 'Super Funky Album' 
+AND album_id = album.id;
+
+-- Same query as above, but rename the column from `title` to `Track_Title` in the output.
+
+SELECT track.title AS Track_Title
+FROM track,album 
+WHERE album.title = 'Super Funky Album' 
+AND album_id = album.id
+
+-- Select all album titles by `Han Solo`.
+AND artist.name= 'Han Solo';
+
+SELECT * FROM artist, artist_album 
+WHERE artist.id = artist_id 
+
+-- Select the average year all albums were released.
+SELECT avg(release_year)
+FROM album;
+
+-- Select the average year all albums by `Leia and the Ewoks` were released.
+
+SELECT AVG(release_year) 
+FROM artist, album, artist_album 
+WHERE artist.id = artist_album.artist_id
+AND album.id = artist_album.album_id 
+AND artist.name = 'Leia and the Ewoks';
+
+-- Select the number of artists
+
+SELECT count(id)
+FROM artist;
+
+-- Select the number of tracks on `Super Dubstep Album`.
+
+SELECT count(track.id)
+FROM track, album
+WHERE album.title = "Super Dubstep Album";

notes.sql

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+-- Create a database for taking notes.
+
+PRAGMA foreign_keys = ON;
+
+CREATE TABLE author(
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  author_name VARCHAR(64) NOT NULL
+);
+
+CREATE TABLE note (
+id INTEGER PRIMARY KEY AUTOINCREMENT,
+title VARCHER(128) NOT NULL,
+content VARCHAR(2056) NOT NULL,
+author_id INTEGER REFERENCES author(id),
+timestamp DATE DEFAULT (datetime('now', 'localtime'))
+FOREIGN KEY(author_id) REFERENCES author(id) ON DELETE CASCADE
+);
+
+INSERT INTO author (author_name) VALUES ("David Loveday");
+INSERT INTO author (author_name) VALUES ("Mcbed Abed");
+INSERT INTO author (author_name) VALUES ("John Medina");
+INSERT INTO author (author_name) VALUES ("Joseph Alagoa");
+
+INSERT INTO note (title, content, author_id) VALUES ("Note by David", "This is a note by David", 1);
+INSERT INTO note (title, content, author_id) VALUES("Note by Mcbed", "This is a note by Mcbed", 2);
+INSERT INTO note (title, content, author_id) VALUES("Note by John", "This is a note by John", 3);
+INSERT INTO note (title, content, author_id) VALUES("Note by Joseph", "This is a note by Joseph", 4);
+INSERT INTO note (title, content, author_id) VALUES("Another by John", "This is a note by John", 3);
+INSERT INTO note (title, content, author_id) VALUES("Another by David", "This is another note by David", 1);
+INSERT INTO note (title, content, author_id) VALUES("Another by Mcbed", "This is another note by Mcbed", 2);
+
+SELECT author_name, title, content,  timestamp FROM note, author
+WHERE author.author_name = "Mcbed Abed"
+AND author.id = author_id;
+
+SELECT author.author_name FROM author, note
+WHERE note.id = 3 and
+author.id = author_id;
+
+SELECT author_name, count(title) FROM note, author
+WHERE author.id = author_id
+GROUP BY author.author_name;
+
+DELETE FROM author
+WHERE name = "Note by Mcbed";

tables.sql

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+CREATE TABLE album (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    title VARCHAR(128) NOT NULL,
+    release_year INTEGER
+);
+
+CREATE TABLE artist (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name VARCHAR(128) NOT NULL
+);
+
+CREATE TABLE track (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    title VARCHAR(128) NOT NULL,
+    album_id INTEGER REFERENCES album(id)
+);
+
+CREATE TABLE artist_album (
+    artist_id INTEGER REFERENCES artist(id),
+    album_id INTEGER REFERENCES album(id)
+);