login&register

database.sql

@@ -1,141 +1,51 @@
--- Restaurant Database Management System
---
--- Instructions:
--- 1. Create all required tables.
--- 2. Design appropriate PRIMARY KEY and FOREIGN KEY relationships.
--- 3. Add suitable constraints based on the requirements.
--- 4. Insert initial mock data.
--- 5. Insert at least 3 menu items.
--- 6. The script should be executable from start to finish without errors.
+CREATE TABLE users(
+                      id BIGSERIAL PRIMARY KEY,
+                      username VARCHAR(20) NOT NULL UNIQUE,
+                      password_hash VARCHAR(256) NOT NULL,
+                      email VARCHAR(50)
+);
+
+CREATE TABLE menu_items(
+                           id BIGSERIAL PRIMARY KEY,
+                           name VARCHAR(50) NOT NULL,
+                           description  VARCHAR(100),
+                           price DECIMAL NOT NULL CHECK (price > 0),
+                           category VARCHAR(50)
+);
+
+CREATE TABLE customer_orders(
+                                id BIGSERIAL PRIMARY KEY,
+                                user_id BIGINT NOT NULL,
+                                time TIMESTAMP DEFAULT CURRENT_TIMESTAMP ,
+                                total_price DECIMAL(10 , 2),
+                                CONSTRAINT fk_user_id
+                                    FOREIGN KEY (user_id)
+                                        REFERENCES users(id)
+);
 
 
+CREATE TABLE order_details (
+                               id BIGSERIAL PRIMARY KEY,
+                               order_id BIGINT NOT NULL,
+                               menu_item_id BIGINT NOT NULL,
+                               quantity INTEGER NOT NULL CHECK (quantity > 0),
+                               unit_price DECIMAL(10 , 2) NOT NULL,
 
--- =======================================================
--- USER TABLE
--- =======================================================
---
--- Represents customers using the system.
---
--- Required information:
--- - Unique identifier
--- - Username
--- - Password
--- - Email (optional)
---
--- Requirements:
--- - Each user must have a unique identifier.
--- - Usernames must be unique.
--- - Username and password are required.
--- - Passwords should not be stored in plain text.
---
--- CREATE TABLE ...
+                               CONSTRAINT fk_order
+                                   FOREIGN KEY (order_id)
+                                       REFERENCES customer_orders(id) ,
+
+                               CONSTRAINT fk_menu_item
+                                   FOREIGN KEY (menu_item_id)
+                                       REFERENCES menu_items(id)
+
+);
 
 
+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');
 
--- =======================================================
--- MENU ITEM TABLE
--- =======================================================
---
--- Represents available food and drink items.
---
--- Required information:
--- - Unique identifier
--- - Name
--- - Description (optional)
--- - Price
--- - Category (optional)
---
--- Requirements:
--- - Each menu item must have a unique identifier.
--- - Name is required.
--- - Price must always be positive.
---
--- CREATE TABLE ...
-
-
-
--- =======================================================
--- ORDER TABLE
--- =======================================================
---
--- Represents orders placed by customers.
---
--- Required information:
--- - Unique identifier
--- - Reference to customer
--- - Creation date and time
--- - Total price
---
--- Requirements:
--- - Each order must belong to exactly one user.
--- - A user can have multiple orders.
--- - The relationship between User and Order must be implemented.
---
--- Note:
--- Avoid using reserved SQL keywords as table names.
--- Consider using a name such as "orders" or "customer_orders".
---
--- CREATE TABLE ...
-
-
-
--- =======================================================
--- ORDER DETAIL TABLE
--- =======================================================
---
--- Represents items inside an order.
---
--- Required information:
--- - Unique identifier
--- - Reference to an order
--- - Reference to a menu item
--- - Quantity
--- - Item price at purchase time
---
--- Requirements:
--- - Each detail record must belong to one order.
--- - Each detail record must reference one menu item.
--- - Quantity must always be greater than zero.
--- - Store the item's price at the moment of purchase.
---
--- CREATE TABLE ...
-
-
-
--- =======================================================
--- INITIAL MENU DATA
--- =======================================================
---
--- Insert at least 3 food or drink items.
---
--- Example categories:
--- - Pizza
--- - Burger
--- - Pasta
--- - Drink
---
--- INSERT INTO ...
-
-
-
--- =======================================================
--- OPTIONAL TEST DATA
--- =======================================================
---
--- You may insert sample users and orders for testing.
--- This section is optional.
---
--- INSERT INTO ...
-
-
-
--- =======================================================
--- VERIFICATION QUERIES
--- =======================================================
---
--- Uncomment these queries to verify your database.
---
--- SELECT * FROM ...;
--- SELECT * FROM ...;
--- SELECT * FROM ...;
--- SELECT * FROM ...;