diff --git a/task.sql b/task.sql
index cc65344..f38a055 100644
--- a/task.sql
+++ b/task.sql
@@ -1,33 +1,51 @@
--- Create database and tables
-
+DROP DATABASE IF EXISTS ShopDB;
 CREATE DATABASE ShopDB;
 USE ShopDB;
 
+
 CREATE TABLE Countries (
-    ID INT,
-    Name VARCHAR(50),
-    PRIMARY KEY (ID)
+    ID INT AUTO_INCREMENT PRIMARY KEY,
+    Name VARCHAR(50) NOT NULL
+);
+
+
+CREATE TABLE Warehouses (
+    ID INT AUTO_INCREMENT PRIMARY KEY,
+    Name VARCHAR(50) NOT NULL,
+    Address VARCHAR(100),
+    CountryID INT NOT NULL,
+    FOREIGN KEY (CountryID) REFERENCES Countries(ID)
+);
+
+
+CREATE TABLE Products (
+    ID INT AUTO_INCREMENT PRIMARY KEY,
+    Name VARCHAR(50) NOT NULL
 );
 
+
 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 AUTO_INCREMENT PRIMARY KEY,
+    ProductID INT NOT NULL,
+    WarehouseID INT NOT NULL,
+    WarehouseAmount INT UNSIGNED NOT NULL DEFAULT 0,
+    FOREIGN KEY (ProductID) REFERENCES Products(ID),
+    FOREIGN KEY (WarehouseID) REFERENCES Warehouses(ID),
+    UNIQUE (ProductID, WarehouseID)
 );
 
--- Populate test data
-
-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 Countries (Name)
+VALUES ('Country1'), ('Country2');
+
+INSERT INTO Warehouses (Name, Address, CountryID)
+VALUES 
+('Warehouse-1', 'City-1, Street-1', 1),
+('Warehouse-2', 'City-2, Street-2', 2);
+
+INSERT INTO Products (Name)
+VALUES ('AwesomeProduct');
+
+INSERT INTO ProductInventory (ProductID, WarehouseID, WarehouseAmount)
+VALUES 
+(1, 1, 2),
+(1, 2, 5);