From 79e95006d822f66f53a399df90ed1a416d149350 Mon Sep 17 00:00:00 2001
From: Mykola Honcharenko <nikolay.honcharenko#gmail.com>
Date: Sat, 13 Jun 2026 12:38:00 +0300
Subject: [PATCH 1/3] Solution.

---
 task.sql | 44 ++++++++++++++++++++++++++++++++------------
 1 file changed, 32 insertions(+), 12 deletions(-)

diff --git a/task.sql b/task.sql
index cc65344..ce58731 100644
--- a/task.sql
+++ b/task.sql
@@ -1,5 +1,3 @@
--- Create database and tables
-
 CREATE DATABASE ShopDB;
 USE ShopDB;
 
@@ -9,25 +7,47 @@ 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)
+    PRIMARY KEY (ID),
+    FOREIGN KEY (CountryID) REFERENCES Countries(ID) ON DELETE NO ACTION
 );
 
--- Populate test data
+CREATE TABLE ProductInventory (
+    ID INT,
+    ProductID INT,
+    WarehouseAmount INT,
+    WarehousesID INT,
+    FOREIGN KEY (ProductID) REFERENCES Products(ID) ON DELETE NO ACTION,
+    FOREIGN KEY (WarehousesID) REFERENCES Warehouses(ID) ON DELETE NO ACTION,
+    PRIMARY KEY (ID)
+);
 
 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 Products (ID, ProductName)
+    VALUES (2, 'AwersomeProduct');
+
+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,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, ProductID, WarehouseAmount, WarehousesID)
+	VALUES (1, 1, 2,1);
+INSERT INTO ProductInventory (ID, ProductID, WarehouseAmount, WarehousesID)
+	VALUES (2,2, 5, 2);
\ No newline at end of file

From b5a96acac5a5ae2ffdcaffb8d24bf0a14dc65a5d Mon Sep 17 00:00:00 2001
From: Mykola Honcharenko <nikolay.honcharenko#gmail.com>
Date: Sat, 13 Jun 2026 12:45:33 +0300
Subject: [PATCH 2/3] Add drop database command in top of the file.

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

diff --git a/task.sql b/task.sql
index ce58731..2a7c5b4 100644
--- a/task.sql
+++ b/task.sql
@@ -1,3 +1,4 @@
+DROP DATABASE ShopDB;
 CREATE DATABASE ShopDB;
 USE ShopDB;
 

From 202db75eabeaf251faa318befc7f356fc6069f68 Mon Sep 17 00:00:00 2001
From: Mykola Honcharenko <nikolay.honcharenko#gmail.com>
Date: Sat, 13 Jun 2026 12:52:12 +0300
Subject: [PATCH 3/3] A design for deleting a database, with a check for the
 existence of the database.

---
 task.sql | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/task.sql b/task.sql
index 2a7c5b4..fc03d77 100644
--- a/task.sql
+++ b/task.sql
@@ -1,4 +1,4 @@
-DROP DATABASE ShopDB;
+DROP DATABASE IF EXISTS ShopDB;
 CREATE DATABASE ShopDB;
 USE ShopDB;