From 7ddc9fef2b8e9bbd370d68d44f0986345973b449 Mon Sep 17 00:00:00 2001
From: Yuriy Mishchuk <yuramishchuk1703@gmail.com>
Date: Wed, 22 Apr 2026 20:46:40 +0300
Subject: [PATCH] Normalize ShopDB to 3NF

---
 task.sql | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/task.sql b/task.sql
index cc65344..2de0e08 100644
--- a/task.sql
+++ b/task.sql
@@ -21,6 +21,34 @@ CREATE TABLE ProductInventory (
 );
 
 -- Populate test data
+CREATE TABLE Countries (
+ID INT AUTO_INCREMENT PRIMARY KEY,
+ Name VARCHAR(255)
+);
+
+CREATE TABLE Products(
+ID INT AUTO_INCREMENT PRIMARY KEY,
+NAME VARCHAR(255)
+);
+
+CREATE TABLE Warehouses(
+ID INT AUTO_INCREMENT PRIMARY KEY,
+Name VARCHAR(255),
+Address VARCHAR(255),
+CountryID INT,
+FOREIGN KEY (CountryID) REFERENCES Countries(ID)
+);
+
+
+CREATE TABLE ProductInventory (
+    ProductID INT,
+    WarehouseID INT,
+    Amount INT,
+    PRIMARY KEY (ProductID, WarehouseID),
+    FOREIGN KEY (ProductID) REFERENCES Products(ID),
+    FOREIGN KEY (WarehouseID) REFERENCES Warehouses(ID)
+);
+
 
 INSERT INTO Countries (ID,Name)
 	VALUES (1, 'Country1');