text: CREATE DATABASE	OnlineStore
  
  USE OnlineStore
  
  CREATE TABLE [ItemTypes](
  [ItemTypeID] INT PRIMARY KEY NOT NULL ,
  [Name] VARCHAR(50)
  );
  
  CREATE TABLE [Items](
  [ItemID] INT PRIMARY KEY NOT NULL ,
  [Name] VARCHAR(50) NOT NULL,
  [ItemTypeID] INT FOREIGN KEY REFERENCES [ItemTypes]([ItemTypeID])
  );
  
  CREATE TABLE [Cities](
  [CityID] INT PRIMARY KEY NOT NULL ,
  [Name] VARCHAR(50)
  );
  
  CREATE TABLE [Customers](
  [CustomerID] INT PRIMARY KEY NOT NULL ,
  [Name] VARCHAR(50) NOT NULL,
  [Birthday] DATE,
  [CityID] INT FOREIGN KEY REFERENCES [Cities]([CityID])
  );
  
  CREATE TABLE [Orders](
  [OrderID] INT PRIMARY KEY NOT NULL ,
  [CustomerID] INT FOREIGN KEY REFERENCES [Customers]([CustomerID])
  );
  
  CREATE TABLE [OrderItems](
  [OrderID] INT FOREIGN KEY REFERENCES [Orders]([OrderID]),
  [ItemID] INT FOREIGN KEY REFERENCES [Items]([ItemID])
  PRIMARY KEY ([OrderID],[ItemID])
  )