From 42b9af812661732e0962c0464b68dc5415d0e632 Mon Sep 17 00:00:00 2001
From: godfri228 <overe14@gmail.com>
Date: Mon, 1 Jun 2026 14:24:18 +0300
Subject: [PATCH] Normalize ShopDB to 3NF

---
 task.sql | 59 ++++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 38 insertions(+), 21 deletions(-)

diff --git a/task.sql b/task.sql
index cc65344..d8cb299 100644
--- a/task.sql
+++ b/task.sql
@@ -1,33 +1,50 @@
 -- Create database and tables
-
 CREATE DATABASE ShopDB;
 USE ShopDB;
 
 CREATE TABLE Countries (
-    ID INT,
-    Name VARCHAR(50),
-    PRIMARY KEY (ID)
+  ID INT,
+  Name VARCHAR(50),
+  PRIMARY KEY (ID)
+);
+
+CREATE TABLE Warehouses (
+  ID INT,
+  Name VARCHAR(50),
+  Address VARCHAR(50),
+  CountryID INT,
+  FOREIGN KEY (CountryID) REFERENCES Countries(ID) ON DELETE NO ACTION,
+  PRIMARY KEY (ID)
+);
+
+CREATE TABLE Products (
+  ID INT,
+  Name VARCHAR(50),
+  PRIMARY KEY (ID)
 );
 
 CREATE TABLE ProductInventory (
-    ID INT,
-    ProductName VARCHAR(50),
-    WarehouseAmount INT,
-    WarehouseName VARCHAR(50),
-    WarehouseAddress VARCHAR(50), 
-    CountryID INT,
-	FOREIGN KEY (CountryID) REFERENCES Countries(ID) ON DELETE NO ACTION,
-    PRIMARY KEY (ID)
+  ID INT,
+  ProductID INT,
+  WarehouseAmount INT,
+  WarehouseID INT,
+  FOREIGN KEY (ProductID) REFERENCES Products(ID) ON DELETE NO ACTION,
+  FOREIGN KEY (WarehouseID) REFERENCES Warehouses(ID) ON DELETE NO ACTION,
+  PRIMARY KEY (ID)
 );
 
 -- Populate test data
+INSERT INTO Countries (ID, Name) VALUES (1, 'Country1');
+INSERT INTO Countries (ID, Name) VALUES (2, 'Country2');
+
+INSERT INTO Warehouses (ID, Name, Address, CountryID)
+VALUES (1, 'Warehouse-1', 'City-1, Street-1', 1);
+INSERT INTO Warehouses (ID, Name, Address, CountryID)
+VALUES (2, 'Warehouse-2', 'City-2, Street-2', 2);
+
+INSERT INTO Products (ID, Name) VALUES (1, 'AwersomeProduct');
 
-INSERT INTO Countries (ID,Name)
-	VALUES (1, 'Country1');
-INSERT INTO Countries (ID,Name)
-	VALUES (2, 'Country2');
-    
-INSERT INTO ProductInventory (ID,ProductName,WarehouseAmount,WarehouseName,WarehouseAddress,CountryID)
-	VALUES (1, 'AwersomeProduct', 2, 'Warehouse-1', 'City-1, Street-1',1);
-INSERT INTO ProductInventory (ID,ProductName,WarehouseAmount,WarehouseName,WarehouseAddress,CountryID)
-	VALUES (2, 'AwersomeProduct', 5, 'Warehouse-2', 'City-2, Street-2',2);
+INSERT INTO ProductInventory (ID, ProductID, WarehouseAmount, WarehouseID)
+VALUES (1, 1, 2, 1);
+INSERT INTO ProductInventory (ID, ProductID, WarehouseAmount, WarehouseID)
+VALUES (2, 1, 5, 2);