Solution

task.sql

@@ -9,25 +9,35 @@ CREATE TABLE Countries (
     PRIMARY KEY (ID)
 );
 
+CREATE TABLE Warehouses (
+    ID INT,
+    Amount INT,
+    Name VARCHAR(50),
+    Address VARCHAR(50),
+    PRIMARY KEY (ID)
+);
+
 CREATE TABLE ProductInventory (
     ID INT,
     ProductName VARCHAR(50),
-    WarehouseAmount INT,
-    WarehouseName VARCHAR(50),
-    WarehouseAddress VARCHAR(50), 
+    WarehouseID INT,
     CountryID INT,
 	FOREIGN KEY (CountryID) REFERENCES Countries(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, Amount, Name, Address)
+    VALUES (1, 2, 'Warehouse-1', 'City-1, Street-1'),
+           (2, 5, 'Warehouse-2', 'City-2, Street-2');
 
-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,ProductName,WarehouseID,CountryID)
+	VALUES (1, 'AwersomeProduct', 1,1);
+INSERT INTO ProductInventory (ID,ProductName,WarehouseID,CountryID)
+	VALUES (2, 'AwersomeProduct', 2,2);
+