From 9ef6717f80a16fb60279cc9a3110c97cad569848 Mon Sep 17 00:00:00 2001
From: Vitalii <stalchenkovitaliy@gmail.com>
Date: Fri, 10 Jul 2026 13:25:39 +0400
Subject: [PATCH] Normalization database

---
 task.sql | 36 ++++++++++++++++++++++++++++--------
 1 file changed, 28 insertions(+), 8 deletions(-)

diff --git a/task.sql b/task.sql
index cc65344..e1263f5 100644
--- a/task.sql
+++ b/task.sql
@@ -9,25 +9,45 @@ CREATE TABLE Countries (
     PRIMARY KEY (ID)
 );
 
-CREATE TABLE ProductInventory (
+CREATE TABLE Products (
     ID INT,
     ProductName VARCHAR(50),
-    WarehouseAmount INT,
+    PRIMARY KEY (ID)
+);
+
+CREATE TABLE Warehouses (
+    ID INT,
     WarehouseName VARCHAR(50),
-    WarehouseAddress VARCHAR(50), 
+    WarehouseAddress VARCHAR(50),
     CountryID INT,
 	FOREIGN KEY (CountryID) REFERENCES Countries(ID) ON DELETE NO ACTION,
     PRIMARY KEY (ID)
 );
 
--- Populate test data
+CREATE TABLE ProductInventory (
+    ID INT,
+    ProductID INT,
+    WarehouseID INT,
+    WarehouseAmount INT,
+    PRIMARY KEY (ID),
+    FOREIGN KEY (ProductID) REFERENCES Products (ID) ON DELETE NO ACTION,
+    FOREIGN KEY (WarehouseID) REFERENCES Warehouses (ID) ON DELETE NO ACTION
+);
 
 INSERT INTO Countries (ID,Name)
 	VALUES (1, 'Country1');
 INSERT INTO Countries (ID,Name)
 	VALUES (2, 'Country2');
+
+INSERT INTO Products (ID, ProductName)
+	VALUES (1, 'AwersomeProduct');
     
-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  Warehouses (ID, WarehouseName, WarehouseAddress, CountryID)
+	VALUES (1, 'Warehouse-1', 'City-1, Street-1', 1);
+INSERT INTO Warehouses (ID, WarehouseName, WarehouseAddress, CountryID)
+	VALUES (2, 'Warehouse-2',  'City-2, Street-2', 2);
+
+INSERT INTO ProductInventory (ID,WarehouseAmount, ProductID, WarehouseID)
+	VALUES (1, 2, 1, 1);
+INSERT INTO ProductInventory (ID, WarehouseAmount, ProductID, WarehouseID)
+	VALUES (2, 5, 1, 2);