want an ER diagram for portal food ordering in asp.net

please give me local and foreign literature

Online food ordering is a process of ordering food from a local restaurant or food cooperative through a web page or app. Much like ordering consumer goods online, many of these allow customers to keep accounts with them in order to make frequent ordering convenient. A customer will search for a favorite restaurant, usually filtered via type of cuisine and choose from available items, and choose delivery or pick-up. Payment can be amongst others either by credit card or cash, with the restaurant returning a percentage to the online food company.

In May 2015, TechCrunch reported that "of the $70 billion [takeout and delivery market], only about $9 billion (roughly 13 percent) is online."

Menufy partners with restaurants to provide online food ordering capabilities.

We develop e-commerce software and custom websites for restaurants that enable customers to digitally and interactively browse a food menu, to place take-out or delivery orders in a shopping cart, and to pay online by credit card via our secure payment processor.

According to a 2012 Restaurant Sciences internet marketing study, 50% of independent restaurants do not have a website, and of the other 50% that are on the web, 60% do not have an online menu and 95% are not mobile-ready. Such are the trends that drive Menufy. Advertise your delicious food online and start taking orders!