false

database.sql

@@ -7,9 +7,10 @@
 -- 4. Insert initial mock data.
 -- 5. Insert at least 3 menu items.
 -- 6. The script should be executable from start to finish without errors.
-
-
-
+DROP TABLE IF EXISTS order_details;
+DROP TABLE IF EXISTS orders;
+DROP TABLE IF EXISTS menu_items;
+DROP TABLE IF EXISTS users;
 -- =======================================================
 -- USER TABLE
 -- =======================================================
@@ -29,9 +30,12 @@
 -- - Passwords should not be stored in plain text.
 --
 -- CREATE TABLE ...
-
-
-
+CREATE TABLE users (
+    id SERIAL PRIMARY KEY,
+    username VARCHAR(50) UNIQUE NOT NULL,
+    password VARCHAR(255) NOT NULL,
+    email VARCHAR(100)
+);
 -- =======================================================
 -- MENU ITEM TABLE
 -- =======================================================
@@ -51,9 +55,13 @@
 -- - Price must always be positive.
 --
 -- CREATE TABLE ...
-
-
-
+CREATE TABLE menu_items (
+    id SERIAL PRIMARY KEY,
+    name VARCHAR(100) NOT NULL,
+    description TEXT,
+    price DECIMAL(10, 2) NOT NULL CHECK (price > 0),
+    category VARCHAR(50)
+);
 -- =======================================================
 -- ORDER TABLE
 -- =======================================================
@@ -76,9 +84,17 @@
 -- Consider using a name such as "orders" or "customer_orders".
 --
 -- CREATE TABLE ...
+CREATE TABLE orders (
+    id SERIAL PRIMARY KEY,
+    user_id INTEGER NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    total_price DECIMAL(10, 2) NOT NULL,
 
-
-
+    CONSTRAINT fk_user
+                    FOREIGN KEY (user_id)
+                    REFERENCES users(id)
+                    ON DELETE CASCADE
+);
 -- =======================================================
 -- ORDER DETAIL TABLE
 -- =======================================================
@@ -99,9 +115,22 @@
 -- - Store the item's price at the moment of purchase.
 --
 -- CREATE TABLE ...
+CREATE TABLE order_details (
+    id SERIAL PRIMARY KEY,
+    order_id INTEGER NOT NULL,
+    menu_item_id INTEGER NOT NULL,
+    quantity INTEGER NOT NULL CHECK (quantity > 0),
+    unit_price DECIMAL(10, 2) NOT NULL,
 
+    CONSTRAINT fk_order
+        FOREIGN KEY (order_id)
+        REFERENCES orders(id)
+        ON DELETE CASCADE,
 
-
+    CONSTRAINT fk_menu_item
+        FOREIGN KEY (menu_item_id)
+        REFERENCES menu_items(id)
+);
 -- =======================================================
 -- INITIAL MENU DATA
 -- =======================================================
@@ -115,9 +144,12 @@
 -- - Drink
 --
 -- INSERT INTO ...
-
-
-
+INSERT INTO menu_items(name, description, price, category) VALUES ('Margherita Pizza', 'Classic pizza with tomato and mozzarella', 12.99, 'Pizza'),
+                                                                  ('Pepperoni Pizza', 'Pizza with pepperoni and cheese', 14.99, 'Pizza'),
+                                                                  ('Cheeseburger', 'Beef burger with cheddar cheese', 10.99, 'Burger'),
+                                                                  ('Spaghetti Carbonara', 'Pasta with eggs, cheese, and pancetta', 13.99, 'Pasta'),
+                                                                  ('Coca-Cola', 'Classic carbonated soft drink', 3.99, 'Drink'),
+                                                                  ('Sparkling Water', 'Natural sparkling mineral water', 2.99, 'Drink');
 -- =======================================================
 -- OPTIONAL TEST DATA
 -- =======================================================