Solution

task.sql

@@ -9,14 +9,29 @@ CREATE TABLE Countries (
     PRIMARY KEY (ID)
 );
 
+CREATE TABLE Warehouse(
+    ID INT AUTO_INCREMENT,
+    WarehouseName VARCHAR(50),
+    WarehouseAddressCity VARCHAR(50),
+    WarehouseAddressStreet VARCHAR(50),
+    CountriesID INT,
+    FOREIGN KEY (CountriesID) REFERENCES Countries(ID) ON DELETE NO ACTION,
+    PRIMARY KEY (ID)
+);
+
+CREATE TABLE Products(
+    ID INT AUTO_INCREMENT,
+    ProductName VARCHAR(50),
+    PRIMARY KEY (ID)
+);
+
 CREATE TABLE ProductInventory (
     ID INT,
-    ProductName VARCHAR(50),
+    WarehouseID INT,
+    ProductID INT,
     WarehouseAmount INT,
-    WarehouseName VARCHAR(50),
-    WarehouseAddress VARCHAR(50), 
-    CountryID INT,
-	FOREIGN KEY (CountryID) REFERENCES Countries(ID) ON DELETE NO ACTION,
+	FOREIGN KEY (ProductID) REFERENCES Products(ID) ON DELETE NO ACTION,
+	FOREIGN KEY (WarehouseID) REFERENCES Warehouse(ID) ON DELETE NO ACTION,
     PRIMARY KEY (ID)
 );
 
@@ -26,8 +41,19 @@ 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 Warehouse (ID, WarehouseName, WarehouseAddressCity, WarehouseAddressStreet, CountriesID)
+	VALUES (1, 'Warehouse-1', 'City-1', 'Street-1', 1);
+INSERT INTO Warehouse (ID, WarehouseName, WarehouseAddressCity, WarehouseAddressStreet, CountriesID)
+	VALUES (2, 'Warehouse-2', 'City-2', 'Street-2', 2);
+
+INSERT INTO Products (ID, ProductName)
+	VALUES (1, 'AwersomeProduct');
+INSERT INTO Products (ID, ProductName)
+	VALUES (2, 'AwersomeProduct');
+
+
+INSERT INTO ProductInventory (ID, WarehouseID, ProductID, WarehouseAmount)
+	VALUES (1, 1, 1, 2);
+INSERT INTO ProductInventory (ID, WarehouseID, ProductID, WarehouseAmount)
+	VALUES (2, 2, 2, 5);