CREATE TABLE Customers(
	customer_id int NOT NULL PRIMARY KEY,
  	first_name varchar(100) NOT NULL,
  	last_name varchar(100) NOT NULL,
  	age int NOT NULL, 
  	country varchar(100) NOT NULL
);

CREATE TABLE Orders(
	order_id int NOT NULL PRIMARY KEY,
  	item varchar(100) NOT NULL,
  	amount int NOT NULL,
  	customer_id int NOT NULL
);

CREATE TABLE Shippings(
	shipping_id int NOT NULL PRIMARY KEY,
  	status varchar(11) NOT NULL,
  	customer int NOT NULL
);