Atiqa N.

task-1/queries.sql

@@ -1,21 +1,40 @@
 ---- 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 < 50;
 -- **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 b.title, a.first_name || ' ' || a.last_name AS author
+FROM books b
+JOIN authors a ON a.id = b.author_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 b.title, b.published_year
+FROM books b
+JOIN authors a ON a.id = b.author_id
+WHERE a.first_name || ' ' || a.last_name = 'Stephen King'
+ORDER BY b.published_year ASC;
 
 -- **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 ('Atiqa', 'Naseer', 'Pakistani', 1999);
 -- **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 ('Sunset Rose', '2026', 'Romance', 25);
 -- **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';
 
+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 id = 101;
 ---
 
 -- ### Bonus questions _(optional)_

task-2/data/setup.sql

@@ -0,0 +1,16 @@
+-- CREATE NEW TABLES
+
+CREATE TABLE decks (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name TEXT NOT NULL,
+    description TEXT
+);
+
+CREATE TABLE cards (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    question TEXT NOT NULL,
+    answer TEXT NOT NULL,
+    learned INTEGER NOT NULL DEFAULT 0,
+    deck_id INTEGER NOT NULL,
+    FOREIGN KEY (deck_id) REFERENCES decks(id)
+);

task-2/migrate.js

@@ -0,0 +1,50 @@
+import { readFileSync } from 'fs';
+import Database from 'better-sqlite3';
+import { fileURLToPath } from 'url';
+import { dirname, join } from 'path';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const DATA_FILE = join(__dirname, 'data/data.json');
+const DB_FILE = join(__dirname, 'data/flashcards.db');
+
+const raw = readFileSync(DATA_FILE, 'utf-8');
+const data = JSON.parse(raw);
+
+const db = new Database(DB_FILE);
+db.pragma('foreign_keys = ON');
+
+const insertDeck = db.prepare(
+  'INSERT INTO decks (id, name, description) VALUES (?, ?, ?)'
+);
+
+const insertCard = db.prepare(
+  'INSERT INTO cards (id, question, answer, learned, deck_id) VALUES (?, ?, ?, ?, ?)'
+);
+
+const migrate = db.transaction(() => {
+  // Clear existing rows so the migration can be re-run safely.
+  db.prepare('DELETE FROM cards').run();
+  db.prepare('DELETE FROM decks').run();
+
+  for (const deck of data.decks) {
+    insertDeck.run(deck.id, deck.name, deck.description);
+  }
+
+  for (const card of data.cards) {
+    insertCard.run(
+      card.id,
+      card.question,
+      card.answer,
+      card.learned ? 1 : 0,
+      card.deckId
+    );
+  }
+});
+
+migrate();
+
+console.log(
+  `Migration complete: inserted ${data.decks.length} decks and ${data.cards.length} cards.`
+);
+
+db.close();