CREATE TABLE "customers" (
	"Id" INTEGER PRIMARY KEY,
	"LastName" TEXT,
	"FirstName" TEXT
);


CREATE TABLE "goods" (
	"Id" TEXT PRIMARY KEY,
	"Flavor" TEXT,
	"Food" TEXT,
	"Price" REAL
);


CREATE TABLE "items" (
	"Receipt" INTEGER,
	"Ordinal" INTEGER,
	"Item" TEXT,
	PRIMARY KEY(Receipt, Ordinal),
	FOREIGN KEY (Item) REFERENCES goods(Id)
    FOREIGN KEY (Receipt) REFERENCES receipts(ReceiptNumber)
);

CREATE TABLE "receipts" (
	"ReceiptNumber" INTEGER PRIMARY KEY,
	"Date" TEXT,
	"CustomerId" INTEGER,
	FOREIGN KEY(CustomerId) REFERENCES customers(Id)
);