From f931578739f1cbadfc0206dcdf6bcee494505dc2 Mon Sep 17 00:00:00 2001 From: Serhii Date: Tue, 21 Oct 2025 10:29:54 +0300 Subject: [PATCH 1/3] Solution --- task.sql | 58 ++++++++++++++++++++++++++++++++++---------------------- 1 file changed, 35 insertions(+), 23 deletions(-) diff --git a/task.sql b/task.sql index cc65344..ada5d54 100644 --- a/task.sql +++ b/task.sql @@ -1,33 +1,45 @@ --- Create database and tables - 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, + 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), + ID INT AUTO_INCREMENT PRIMARY KEY, + ProductID INT, + WarehouseID INT, WarehouseAmount INT, - WarehouseName VARCHAR(50), - WarehouseAddress VARCHAR(50), - CountryID INT, - FOREIGN KEY (CountryID) REFERENCES Countries(ID) ON DELETE NO ACTION, - PRIMARY KEY (ID) + FOREIGN KEY (ProductID) REFERENCES Products(ID), + FOREIGN KEY (WarehouseID) REFERENCES Warehouses(ID) ); --- 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); From d53428c69061acaba60531536e5c4597467d5822 Mon Sep 17 00:00:00 2001 From: Serhii Date: Tue, 21 Oct 2025 11:00:39 +0300 Subject: [PATCH 2/3] Solution 2 --- task.sql | 1 + 1 file changed, 1 insertion(+) diff --git a/task.sql b/task.sql index ada5d54..642953b 100644 --- a/task.sql +++ b/task.sql @@ -1,3 +1,4 @@ +DROP DATABASE IF EXISTS ShopDB; CREATE DATABASE ShopDB; USE ShopDB; From d59390a2a775491c5fc4e09eed1d7981bf2d5863 Mon Sep 17 00:00:00 2001 From: Serhii Date: Tue, 21 Oct 2025 11:07:29 +0300 Subject: [PATCH 3/3] Solution 3 --- task.sql | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/task.sql b/task.sql index 642953b..f38a055 100644 --- a/task.sql +++ b/task.sql @@ -2,31 +2,36 @@ DROP DATABASE IF EXISTS ShopDB; CREATE DATABASE ShopDB; USE ShopDB; + CREATE TABLE Countries ( 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, + 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 AUTO_INCREMENT PRIMARY KEY, - ProductID INT, - WarehouseID INT, - WarehouseAmount INT, + 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) + FOREIGN KEY (WarehouseID) REFERENCES Warehouses(ID), + UNIQUE (ProductID, WarehouseID) ); INSERT INTO Countries (Name)