From 5f408005a70db763976701d61b6a33c1d0cec17e Mon Sep 17 00:00:00 2001 From: vetal Date: Tue, 29 Jul 2025 17:16:54 +0000 Subject: [PATCH 1/2] Database Normalization --- task.sql | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/task.sql b/task.sql index cc65344..d7a313f 100644 --- a/task.sql +++ b/task.sql @@ -31,3 +31,51 @@ INSERT INTO ProductInventory (ID,ProductName,WarehouseAmount,WarehouseName,Wareh 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); +DROP DATABASE IF EXISTS ShopDB; + +CREATE DATABASE ShopDB; +USE ShopDB; + +CREATE TABLE Countries ( + ID INT PRIMARY KEY, + Name VARCHAR(100) NOT NULL +); + +CREATE TABLE Warehouses ( + ID INT PRIMARY KEY, + Name VARCHAR(100) NOT NULL, + Address VARCHAR(255), + CountryID INT, + FOREIGN KEY (CountryID) REFERENCES Countries(ID) +); + +CREATE TABLE Products ( + ID INT PRIMARY KEY, + ProductName VARCHAR(100) NOT NULL +); + +CREATE TABLE ProductInventory ( + ID INT PRIMARY KEY, + ProductID INT, + WarehouseID INT, + Amount INT, + FOREIGN KEY (ProductID) REFERENCES Products(ID), + FOREIGN KEY (WarehouseID) REFERENCES Warehouses(ID) +); + +INSERT INTO Countries (ID, Name) VALUES +(1, 'Ukraine'), +(2, 'Poland'); + +INSERT INTO Warehouses (ID, Name, Address, CountryID) VALUES +(1, 'Main Warehouse', 'Kyiv, UA', 1), +(2, 'Backup Warehouse', 'Warsaw, PL', 2); + +INSERT INTO Products (ID, ProductName) VALUES +(1, 'Laptop'), +(2, 'Smartphone'); + +INSERT INTO ProductInventory (ID, ProductID, WarehouseID, Amount) VALUES +(1, 1, 1, 50), +(2, 2, 1, 30), +(3, 2, 2, 100); From 350e25286265177f92600c768e9ec2dd84d7e843 Mon Sep 17 00:00:00 2001 From: vetal Date: Tue, 29 Jul 2025 18:18:48 +0000 Subject: [PATCH 2/2] update Database Normalization --- task.sql | 33 --------------------------------- 1 file changed, 33 deletions(-) diff --git a/task.sql b/task.sql index d7a313f..3e4b03d 100644 --- a/task.sql +++ b/task.sql @@ -1,36 +1,3 @@ --- Create database and tables - -CREATE DATABASE ShopDB; -USE ShopDB; - -CREATE TABLE Countries ( - ID INT, - Name VARCHAR(50), - PRIMARY KEY (ID) -); - -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) -); - --- 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); DROP DATABASE IF EXISTS ShopDB; CREATE DATABASE ShopDB;