diff --git a/task-1/books_library.db b/task-1/books_library.db
index 88b0418..e6fbfb0 100644
Binary files a/task-1/books_library.db and b/task-1/books_library.db differ
diff --git a/task-1/package-lock.json b/task-1/package-lock.json
new file mode 100644
index 0000000..d261c26
--- /dev/null
+++ b/task-1/package-lock.json
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+        "safe-buffer": "^5.0.1"
+      },
+      "engines": {
+        "node": "*"
+      }
+    },
+    "node_modules/util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
+      "license": "MIT"
+    },
+    "node_modules/wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
+      "license": "ISC"
+    }
+  }
+}
diff --git a/task-1/package.json b/task-1/package.json
new file mode 100644
index 0000000..9ea092b
--- /dev/null
+++ b/task-1/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "task-1",
+  "version": "1.0.0",
+  "description": "For this task use the books_library database. The sqlite db file is there, and if you are having problems with it loading, then use the sql script to create the database.",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "module",
+  "dependencies": {
+    "better-sqlite3": "^12.8.0"
+  }
+}
diff --git a/task-1/queries.sql b/task-1/queries.sql
index fecf7ad..784b5b4 100644
--- a/task-1/queries.sql
+++ b/task-1/queries.sql
@@ -1,27 +1,68 @@
 ---- 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;   
+ORDER BY published_year ASC;
 
 -- **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,
+    authors.first_name || ' ' || authors.last_name AS author
+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 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 ('Hamed', 'Razizadeh', 'Iranian', 1987);
 
 -- **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, author_id, genre, published_year)
+VALUES ('Freedom For IRAN', 
+(SELECT id FROM authors WHERE first_name = 'Hamed' AND last_name = 'Razizadeh'), 'Documentary', 2026);
 
 -- **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.
+SELECT id FROM books WHERE title = 'The Dark Tower: The Gunslinger';
+UPDATE books
+SET genre = 'Horror'
+WHERE title = 'The Dark Tower: The Gunslinger';
+SELECT id, 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;
+SELECT * FROM books WHERE id = 101;
 
 -- ### 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 a.id, a.first_name, a.last_name
+FROM authors a
+LEFT JOIN books b ON a.id = b.author_id
+WHERE b.id IS NULL;
\ No newline at end of file
diff --git a/task-2/data/data.json b/task-2/data/data.json
deleted file mode 100644
index 42a5b06..0000000
--- a/task-2/data/data.json
+++ /dev/null
@@ -1,91 +0,0 @@
-{
-  "decks": [
-    {
-      "id": 1,
-      "name": "JavaScript Basics",
-      "description": "Core JavaScript concepts"
-    },
-    {
-      "id": 2,
-      "name": "SQL Fundamentals",
-      "description": "Writing database queries"
-    },
-    {
-      "id": 3,
-      "name": "HTML & CSS",
-      "description": "Building web pages"
-    }
-  ],
-  "cards": [
-    {
-      "id": 1,
-      "question": "What is a variable?",
-      "answer": "A named container for storing data values",
-      "learned": true,
-      "deckId": 1
-    },
-    {
-      "id": 2,
-      "question": "What does `const` mean?",
-      "answer": "Declares a variable that cannot be reassigned",
-      "learned": false,
-      "deckId": 1
-    },
-    {
-      "id": 3,
-      "question": "What is an array?",
-      "answer": "An ordered list of values",
-      "learned": true,
-      "deckId": 1
-    },
-    {
-      "id": 4,
-      "question": "What does `===` do?",
-      "answer": "Checks for strict equality (value AND type)",
-      "learned": false,
-      "deckId": 1
-    },
-    {
-      "id": 5,
-      "question": "What is SELECT used for?",
-      "answer": "Retrieving data from a database table",
-      "learned": false,
-      "deckId": 2
-    },
-    {
-      "id": 6,
-      "question": "What is a PRIMARY KEY?",
-      "answer": "A unique identifier for each row in a table",
-      "learned": false,
-      "deckId": 2
-    },
-    {
-      "id": 7,
-      "question": "What does WHERE do?",
-      "answer": "Filters rows in a query based on a condition",
-      "learned": true,
-      "deckId": 2
-    },
-    {
-      "id": 8,
-      "question": "What is a FOREIGN KEY?",
-      "answer": "A column that links to the primary key of another table",
-      "learned": false,
-      "deckId": 2
-    },
-    {
-      "id": 9,
-      "question": "What does a <div> do?",
-      "answer": "Creates a block-level container element",
-      "learned": false,
-      "deckId": 3
-    },
-    {
-      "id": 10,
-      "question": "What is the CSS box model?",
-      "answer": "Every element is a box with content, padding, border, and margin",
-      "learned": false,
-      "deckId": 3
-    }
-  ]
-}
\ No newline at end of file
diff --git a/task-2/data/flashcards.db b/task-2/data/flashcards.db
new file mode 100644
index 0000000..5909407
Binary files /dev/null and b/task-2/data/flashcards.db differ
diff --git a/task-2/migrate.js b/task-2/migrate.js
new file mode 100644
index 0000000..56f4185
--- /dev/null
+++ b/task-2/migrate.js
@@ -0,0 +1,33 @@
+import Database from "better-sqlite3";
+import { readFileSync } from "fs";
+
+const db = new Database("./data/flashcards.db");
+
+const raw = readFileSync("./data/data.json", "utf-8");
+const data = JSON.parse(raw);
+
+// insert decks
+const insertDeck = db.prepare(
+  "INSERT INTO decks (id, name, description) VALUES (?, ?, ?)",
+);
+
+for (const deck of data.decks) {
+  insertDeck.run(deck.id, deck.name, deck.description);
+}
+
+// insert cards
+const insertCard = db.prepare(
+  "INSERT INTO cards (id, question, answer, learned, deck_id) VALUES (?, ?, ?, ?, ?)",
+);
+
+for (const card of data.cards) {
+  insertCard.run(
+    card.id,
+    card.question,
+    card.answer,
+    card.learned ? 1 : 0,
+    card.deckId,
+  );
+}
+
+console.log("Migration complete!");
diff --git a/task-2/package-lock.json b/task-2/package-lock.json
new file mode 100644
index 0000000..72fc35b
--- /dev/null
+++ b/task-2/package-lock.json
@@ -0,0 +1,467 @@
+{
+  "name": "flashcard-app",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "flashcard-app",
+      "version": "1.0.0",
+      "dependencies": {
+        "better-sqlite3": "^12.8.0"
+      }
+    },
+    "node_modules/base64-js": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
+      "integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT"
+    },
+    "node_modules/better-sqlite3": {
+      "version": "12.8.0",
+      "resolved": "https://registry.npmjs.org/better-sqlite3/-/better-sqlite3-12.8.0.tgz",
+      "integrity": "sha512-RxD2Vd96sQDjQr20kdP+F+dK/1OUNiVOl200vKBZY8u0vTwysfolF6Hq+3ZK2+h8My9YvZhHsF+RSGZW2VYrPQ==",
+      "hasInstallScript": true,
+      "license": "MIT",
+      "dependencies": {
+        "bindings": "^1.5.0",
+        "prebuild-install": "^7.1.1"
+      },
+      "engines": {
+        "node": "20.x || 22.x || 23.x || 24.x || 25.x"
+      }
+    },
+    "node_modules/bindings": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.5.0.tgz",
+      "integrity": "sha512-p2q/t/mhvuOj/UeLlV6566GD/guowlr0hHxClI0W9m7MWYkL1F0hLo+0Aexs9HSPCtR1SXQ0TD3MMKrXZajbiQ==",
+      "license": "MIT",
+      "dependencies": {
+        "file-uri-to-path": "1.0.0"
+      }
+    },
+    "node_modules/bl": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-4.1.0.tgz",
+      "integrity": "sha512-1W07cM9gS6DcLperZfFSj+bWLtaPGSOHWhPiGzXmvVJbRLdG82sH/Kn8EtW1VqWVA54AKf2h5k5BbnIbwF3h6w==",
+      "license": "MIT",
+      "dependencies": {
+        "buffer": "^5.5.0",
+        "inherits": "^2.0.4",
+        "readable-stream": "^3.4.0"
+      }
+    },
+    "node_modules/buffer": {
+      "version": "5.7.1",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
+      "integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "base64-js": "^1.3.1",
+        "ieee754": "^1.1.13"
+      }
+    },
+    "node_modules/chownr": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.4.tgz",
+      "integrity": "sha512-jJ0bqzaylmJtVnNgzTeSOs8DPavpbYgEr/b0YL8/2GO3xJEhInFmhKMUnEJQjZumK7KXGFhUy89PrsJWlakBVg==",
+      "license": "ISC"
+    },
+    "node_modules/decompress-response": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/decompress-response/-/decompress-response-6.0.0.tgz",
+      "integrity": "sha512-aW35yZM6Bb/4oJlZncMH2LCoZtJXTRxES17vE3hoRiowU2kWHaJKFkSBDnDR+cm9J+9QhXmREyIfv0pji9ejCQ==",
+      "license": "MIT",
+      "dependencies": {
+        "mimic-response": "^3.1.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/deep-extend": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.6.0.tgz",
+      "integrity": "sha512-LOHxIOaPYdHlJRtCQfDIVZtfw/ufM8+rVj649RIHzcm/vGwQRXFt6OPqIFWsm2XEMrNIEtWR64sY1LEKD2vAOA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=4.0.0"
+      }
+    },
+    "node_modules/detect-libc": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-2.1.2.tgz",
+      "integrity": "sha512-Btj2BOOO83o3WyH59e8MgXsxEQVcarkUOpEYrubB0urwnN10yQ364rsiByU11nZlqWYZm05i/of7io4mzihBtQ==",
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/end-of-stream": {
+      "version": "1.4.5",
+      "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.5.tgz",
+      "integrity": "sha512-ooEGc6HP26xXq/N+GCGOT0JKCLDGrq2bQUZrQ7gyrJiZANJ/8YDTxTpQBXGMn+WbIQXNVpyWymm7KYVICQnyOg==",
+      "license": "MIT",
+      "dependencies": {
+        "once": "^1.4.0"
+      }
+    },
+    "node_modules/expand-template": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/expand-template/-/expand-template-2.0.3.tgz",
+      "integrity": "sha512-XYfuKMvj4O35f/pOXLObndIRvyQ+/+6AhODh+OKWj9S9498pHHn/IMszH+gt0fBCRWMNfk1ZSp5x3AifmnI2vg==",
+      "license": "(MIT OR WTFPL)",
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/file-uri-to-path": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz",
+      "integrity": "sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw==",
+      "license": "MIT"
+    },
+    "node_modules/fs-constants": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/fs-constants/-/fs-constants-1.0.0.tgz",
+      "integrity": "sha512-y6OAwoSIf7FyjMIv94u+b5rdheZEjzR63GTyZJm5qh4Bi+2YgwLCcI/fPFZkL5PSixOt6ZNKm+w+Hfp/Bciwow==",
+      "license": "MIT"
+    },
+    "node_modules/github-from-package": {
+      "version": "0.0.0",
+      "resolved": "https://registry.npmjs.org/github-from-package/-/github-from-package-0.0.0.tgz",
+      "integrity": "sha512-SyHy3T1v2NUXn29OsWdxmK6RwHD+vkj3v8en8AOBZ1wBQ/hCAQ5bAQTD02kW4W9tUp/3Qh6J8r9EvntiyCmOOw==",
+      "license": "MIT"
+    },
+    "node_modules/ieee754": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
+      "integrity": "sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/inherits": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+      "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+      "license": "ISC"
+    },
+    "node_modules/ini": {
+      "version": "1.3.8",
+      "resolved": "https://registry.npmjs.org/ini/-/ini-1.3.8.tgz",
+      "integrity": "sha512-JV/yugV2uzW5iMRSiZAyDtQd+nxtUnjeLt0acNdw98kKLrvuRVyB80tsREOE7yvGVgalhZ6RNXCmEHkUKBKxew==",
+      "license": "ISC"
+    },
+    "node_modules/mimic-response": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-3.1.0.tgz",
+      "integrity": "sha512-z0yWI+4FDrrweS8Zmt4Ej5HdJmky15+L2e6Wgn3+iK5fWzb6T3fhNFq2+MeTRb064c6Wr4N/wv0DzQTjNzHNGQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/minimist": {
+      "version": "1.2.8",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.8.tgz",
+      "integrity": "sha512-2yyAR8qBkN3YuheJanUpWC5U3bb5osDywNB8RzDVlDwDHbocAJveqqj1u8+SVD7jkWT4yvsHCpWqqWqAxb0zCA==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
+    "node_modules/mkdirp-classic": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/mkdirp-classic/-/mkdirp-classic-0.5.3.tgz",
+      "integrity": "sha512-gKLcREMhtuZRwRAfqP3RFW+TK4JqApVBtOIftVgjuABpAtpxhPGaDcfvbhNvD0B8iD1oUr/txX35NjcaY6Ns/A==",
+      "license": "MIT"
+    },
+    "node_modules/napi-build-utils": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/napi-build-utils/-/napi-build-utils-2.0.0.tgz",
+      "integrity": "sha512-GEbrYkbfF7MoNaoh2iGG84Mnf/WZfB0GdGEsM8wz7Expx/LlWf5U8t9nvJKXSp3qr5IsEbK04cBGhol/KwOsWA==",
+      "license": "MIT"
+    },
+    "node_modules/node-abi": {
+      "version": "3.89.0",
+      "resolved": "https://registry.npmjs.org/node-abi/-/node-abi-3.89.0.tgz",
+      "integrity": "sha512-6u9UwL0HlAl21+agMN3YAMXcKByMqwGx+pq+P76vii5f7hTPtKDp08/H9py6DY+cfDw7kQNTGEj/rly3IgbNQA==",
+      "license": "MIT",
+      "dependencies": {
+        "semver": "^7.3.5"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w==",
+      "license": "ISC",
+      "dependencies": {
+        "wrappy": "1"
+      }
+    },
+    "node_modules/prebuild-install": {
+      "version": "7.1.3",
+      "resolved": "https://registry.npmjs.org/prebuild-install/-/prebuild-install-7.1.3.tgz",
+      "integrity": "sha512-8Mf2cbV7x1cXPUILADGI3wuhfqWvtiLA1iclTDbFRZkgRQS0NqsPZphna9V+HyTEadheuPmjaJMsbzKQFOzLug==",
+      "deprecated": "No longer maintained. Please contact the author of the relevant native addon; alternatives are available.",
+      "license": "MIT",
+      "dependencies": {
+        "detect-libc": "^2.0.0",
+        "expand-template": "^2.0.3",
+        "github-from-package": "0.0.0",
+        "minimist": "^1.2.3",
+        "mkdirp-classic": "^0.5.3",
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+        "simple-get": "^4.0.0",
+        "tar-fs": "^2.0.0",
+        "tunnel-agent": "^0.6.0"
+      },
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+        "prebuild-install": "bin.js"
+      },
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+        "ini": "~1.3.0",
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+        "strip-json-comments": "~2.0.1"
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+        "string_decoder": "^1.1.1",
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+      },
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+      "funding": [
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+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
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+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT"
+    },
+    "node_modules/semver": {
+      "version": "7.7.4",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.4.tgz",
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+      "license": "ISC",
+      "bin": {
+        "semver": "bin/semver.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/simple-concat": {
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+      "resolved": "https://registry.npmjs.org/simple-concat/-/simple-concat-1.0.1.tgz",
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+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
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+          "url": "https://www.patreon.com/feross"
+        },
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+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT"
+    },
+    "node_modules/simple-get": {
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+      "resolved": "https://registry.npmjs.org/simple-get/-/simple-get-4.0.1.tgz",
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+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
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+        "once": "^1.3.1",
+        "simple-concat": "^1.0.0"
+      }
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+      "license": "MIT",
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+      }
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+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
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+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
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+      "license": "MIT",
+      "dependencies": {
+        "chownr": "^1.1.1",
+        "mkdirp-classic": "^0.5.2",
+        "pump": "^3.0.0",
+        "tar-stream": "^2.1.4"
+      }
+    },
+    "node_modules/tar-stream": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-2.2.0.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "bl": "^4.0.3",
+        "end-of-stream": "^1.4.1",
+        "fs-constants": "^1.0.0",
+        "inherits": "^2.0.3",
+        "readable-stream": "^3.1.1"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/tunnel-agent": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
+      "integrity": "sha512-McnNiV1l8RYeY8tBgEpuodCC1mLUdbSN+CYBL7kJsJNInOP8UjDDEwdk6Mw60vdLLrr5NHKZhMAOSrR2NZuQ+w==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "safe-buffer": "^5.0.1"
+      },
+      "engines": {
+        "node": "*"
+      }
+    },
+    "node_modules/util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
+      "license": "MIT"
+    },
+    "node_modules/wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
+      "license": "ISC"
+    }
+  }
+}
diff --git a/task-2/src/database.js b/task-2/src/database.js
index a737fcb..8335dcc 100644
--- a/task-2/src/database.js
+++ b/task-2/src/database.js
@@ -6,12 +6,12 @@
 // When every function works correctly, `node app.js` should
 // print exactly the same output as it did with storage.js.
 
-import Database from 'better-sqlite3';
-import { fileURLToPath } from 'url';
-import { dirname, join } from 'path';
+import Database from "better-sqlite3";
+import { fileURLToPath } from "url";
+import { dirname, join } from "path";
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
-const DB_FILE = join(__dirname, '../data/flashcards.db');
+const DB_FILE = join(__dirname, "../data/flashcards.db");
 
 const db = new Database(DB_FILE);
 
@@ -21,23 +21,35 @@ const db = new Database(DB_FILE);
 
 export function getAllDecks() {
   // TODO: return all rows from the decks table
-  throw new Error('Not implemented');
+  const rows = db.prepare("SELECT * FROM decks").all();
+  return rows;
 }
 
 export function getDeckById(id) {
   // TODO: return the deck row with the given id, or null if not found
-  throw new Error('Not implemented');
+  const row = db.prepare("SELECT * FROM decks WHERE id = ?").get(id);
+  return row ?? null;
 }
 
 export function addDeck(name, description) {
   // TODO: insert a new deck and return the new row (including its id)
-  throw new Error('Not implemented');
+  const info = db
+    .prepare("insert into decks (name, description) values (?, ?)")
+    .run(name, description);
+
+  return {
+    id: info.lastInsertRowid,
+    name,
+    description,
+  };
 }
 
 export function deleteDeck(deckId) {
   // TODO: delete the deck with the given id
   //       return true if a row was deleted, false otherwise
-  throw new Error('Not implemented');
+  const info = db.prepare("delete from decks where id = ?").run(deckId);
+
+  return info.changes > 0;
 }
 
 // ----------------------------------------------------------------
@@ -46,22 +58,71 @@ export function deleteDeck(deckId) {
 
 export function getAllCardsForDeck(deckId) {
   // TODO: return all card rows whose deckId matches
-  throw new Error('Not implemented');
+  const rows = db
+    .prepare(
+      `
+      SELECT id, question, answer, learned, deck_id AS deckId
+      FROM cards
+      WHERE deck_id = ?
+    `,
+    )
+    .all(deckId);
+
+  return rows;
 }
 
 export function addCard(question, answer, deckId) {
   // TODO: insert a new card and return the new row (including its id)
-  throw new Error('Not implemented');
+  const info = db
+    .prepare(
+      `
+      INSERT INTO cards (question, answer, deck_id)
+      VALUES (?, ?, ?)
+    `,
+    )
+    .run(question, answer, deckId);
+
+  return {
+    id: info.lastInsertRowid,
+    question,
+    answer,
+    learned: 0,
+    deckId,
+  };
 }
 
 export function markCardLearned(cardId) {
   // TODO: set learned = 1 for the card with the given id
   //       return the updated row, or null if not found
-  throw new Error('Not implemented');
+  const info = db
+    .prepare(
+      `
+      UPDATE cards
+      SET learned = 1
+      WHERE id = ?
+    `,
+    )
+    .run(cardId);
+
+  if (info.changes === 0) return null;
+
+  const row = db
+    .prepare(
+      `
+      SELECT id, question, answer, learned, deck_id AS deckId
+      FROM cards
+      WHERE id = ?
+    `,
+    )
+    .get(cardId);
+
+  return row ?? null;
 }
 
 export function deleteCard(cardId) {
   // TODO: delete the card with the given id
   //       return true if a row was deleted, false otherwise
-  throw new Error('Not implemented');
+  const info = db.prepare("DELETE FROM cards WHERE id = ?").run(cardId);
+
+  return info.changes > 0;
 }