Baraah A.

task-1/queries.sql

@@ -1,27 +1,64 @@
 ---- Queries
 
 -- **Question 1** — List the title and published year of every book in the `'Science Fiction'` genre, ordered by published year (oldest first).
+SELECT title, published_year
+FROM books
+WHERE genre = 'Science Fiction'
+ORDER BY published_year ASC;
 
 -- **Question 2** — Show every book published before 1950. Display the title and year only.
+SELECT title, published_year
+FROM books
+WHERE published_year < 1950;
 
 -- **Question 3** — Show every book in the database along with its author's full name. Combine `first_name` and `last_name` into a single column called `author`. _(Hint: you will need a JOIN.)_
+SELECT books.title, authors.first_name || ' ' || authors.last_name AS author
+FROM books
+JOIN authors ON books.author_id = authors.id;
 
 -- **Question 4** — List all books written by Stephen King. Show the title and published year, ordered by year. _(Hint: JOIN the two tables and filter on the author's name.)_
+SELECT books.title, books.published_year
+FROM books
+JOIN authors ON books.author_id = authors.id
+WHERE authors.first_name = 'Stephen'
+AND authors.last_name = 'King'
+ORDER BY books.published_year;
 
 -- **Question 5** — Add yourself as a new author. Use your real name, or make one up. Pick any nationality and birth year.
+INSERT INTO authors (first_name, last_name, nationality, birth_year)
+VALUES ('Baraah', 'Alshiaani', 'Yemeni', 2000);
 
 -- **Question 6** — Add one book for the author you just inserted. It can be a real book or a made-up one.
+INSERT INTO books (title, published_year, genre, author_id)
+VALUES ('BLife Book', 2026, 'Fiction',  (SELECT id FROM authors WHERE first_name='Baraah' AND last_name='Alshiaani'));
 
 -- **Question 7** — The genre for "The Dark Tower: The Gunslinger" was entered incorrectly as `'Fantasy'`. It should be `'Horror'`. Write an UPDATE to fix it, then verify the change with a SELECT.
+UPDATE books
+SET genre = 'Horror'
+WHERE title = 'The Dark Tower: The Gunslinger';
 
--- **Question 8** — Delete the book you added in Question 6. Make sure your query targets only that specific row.
+-- verify
+SELECT title, genre
+FROM books
+WHERE title = 'The Dark Tower: The Gunslinger';
 
+-- **Question 8** — Delete the book you added in Question 6. Make sure your query targets only that specific row.
+DELETE FROM books
+WHERE title = 'BLife Book';
 ---
 
 -- ### Bonus questions _(optional)_
 
 -- These cover topics slightly beyond the core material. Have a go if you finish early.
 
 -- **Bonus A** — How many books are there per genre? Show the genre name and the count, ordered from most to fewest books.
+SELECT genre, COUNT(*) AS book_count
+FROM books
+GROUP BY genre
+ORDER BY book_count DESC;
 
 -- **Bonus B** — Find any authors in the database who have no books at all. _(Hint: you will need a LEFT JOIN and check for NULL.)
+SELECT authors.first_name, authors.last_name
+FROM authors
+LEFT JOIN books ON authors.id = books.author_id
+WHERE books.id IS NULL;

task-2/migrate.js

@@ -0,0 +1,29 @@
+import fs from 'fs';
+import Database from 'better-sqlite3';
+
+const db = new Database('flashcards.db');
+
+const data = JSON.parse(fs.readFileSync('data/data.json', 'utf-8'));
+
+const insertDeck = db.prepare(`
+  INSERT INTO decks (name, description)
+  VALUES (?, ?)
+`);
+
+const insertCard = db.prepare(`
+  INSERT INTO cards (question, answer, learned, deck_id)
+  VALUES (?, ?, ?, ?)
+`);
+
+data.decks.forEach(deck => {
+  insertDeck.run(deck.name, deck.description);
+});
+
+data.cards.forEach(card => {
+  insertCard.run(
+    card.question,
+    card.answer,
+    card.learned ? 1 : 0, 
+    card.deckId             
+  );
+});