Done

lib/insert.sql

@@ -0,0 +1,15 @@
+INSERT INTO series (id, title, author_id, subgenre_id) VALUES (1, "A Song of Ice and Fire", 1, 1), (2, "Second Series", 2, 2);
+
+INSERT INTO subgenres (id, name) VALUES (1, "medieval"), (2, "space opera");
+
+INSERT INTO authors (id, name) VALUES (1, "George R. R. Martin"), (2, "Second Author");
+
+INSERT INTO books (id, title, year, series_id) VALUES (1, "Game of Thrones", 1996, 1), (2, "A Clash of Kings", 1998, 1), (3, "A Storm of Swords", 2000, 1), (4, "First Book", 2002, 2), (5, "Second Book", 2003, 2), (6, "Third Book", 2005, 2);
+
+INSERT INTO characters (id, name, motto, species, author_id, series_id) VALUES (1, "Lady", "Woof Woof", "direwolf", 1, 1), (2, "Tyrion Lannister", "A Lannister always pays his debts", "human", 1, 1), (3, "Daenerys Targaryen", "If I look back I am lost", "human", 1, 1), (4, "Eddard Stark", "Winter is coming", "human", 1, 1);
+
+INSERT INTO characters (id, name, motto, species, author_id, series_id) VALUES (5, "Character One", "motto one", "cylon", 2, 2), (6, "Character Two", "motto two", "human", 2, 2), (7, "Character Three", "motto three", "cylon", 2, 2), (8, "Character Four", "motto four", "cylon", 2, 2);
+
+INSERT INTO character_books (id, book_id, character_id) VALUES (1, 1, 1), (2, 1, 2), (3, 2, 2), (4, 3, 2), (5, 1, 3), (6, 2, 3), (7, 3, 3), (8, 1, 4);
+
+INSERT INTO character_books (id, book_id, character_id) VALUES (9, 4, 5), (10, 4, 6), (11, 5, 6), (12, 6, 6), (13, 4, 7), (14, 5, 7), (15, 6, 7), (16, 4, 8);

lib/querying.rb

@@ -1,24 +1,24 @@
 def select_books_titles_and_years_in_first_series_order_by_year
-  "Write your SQL query here"
+  "SELECT title, year FROM books WHERE series_id = 1 ORDER BY books.year"
 end
 
 def select_name_and_motto_of_char_with_longest_motto
-  "Write your SQL query here"
+  "SELECT characters.name, characters.motto FROM characters ORDER BY LENGTH(characters.motto) DESC LIMIT 1;"
 end
 
 
 def select_value_and_count_of_most_prolific_species
-  "Write your SQL query here"
+  "SELECT species, COUNT(*) FROM characters GROUP BY species ORDER BY COUNT(species) DESC LIMIT 1;"
 end
 
 def select_name_and_series_subgenres_of_authors
-  "Write your SQL query here"
+  "SELECT authors.name, subgenres.name FROM authors JOIN subgenres ON authors.id = subgenres.id;"
 end
 
 def select_series_title_with_most_human_characters
-  "Write your SQL query here"
+  "SELECT series.title FROM series JOIN books ON books.series_id = series.id JOIN character_books ON character_books.book_id = books.id JOIN characters ON character_books.character_id = characters.id WHERE characters.species = 'human' GROUP BY series.title ORDER BY COUNT(*) DESC LIMIT 1"
 end
 
 def select_character_names_and_number_of_books_they_are_in
-  "Write your SQL query here"
+  "SELECT characters.name, COUNT(*) as book_count from character_books JOIN characters ON character_books.character_id = characters.id GROUP BY characters.name ORDER BY book_count DESC;"
 end

lib/schema.sql

@@ -0,0 +1,38 @@
+CREATE TABLE series (
+  id INTEGER PRIMARY KEY,
+  title TEXT,
+  author_id INTEGER,
+  subgenre_id INTEGER
+);
+
+CREATE TABLE subgenres (
+  id INTEGER PRIMARY KEY,
+  name TEXT
+);
+
+CREATE TABLE authors (
+  id INTEGER PRIMARY KEY,
+  name TEXT
+);
+
+CREATE TABLE books (
+  id INTEGER PRIMARY KEY,
+  title TEXT,
+  year INTEGER,
+  series_id INTEGER
+);
+
+CREATE TABLE characters (
+  id INTEGER PRIMARY KEY,
+  name TEXT,
+  species TEXT,
+  motto TEXT,
+  series_id INTEGER,
+  author_id INTEGER
+);
+
+CREATE TABLE character_books (
+  id INTEGER PRIMARY KEY,
+  book_id INTEGER,
+  character_id INTEGER
+);

lib/update.sql

@@ -0,0 +1 @@
+UPDATE characters set species = 'Martian' where name = 'Character Four';