They can select the products online and put them in the shopping cart. The customers will need to register and log in first in order to purchase items.
Step 2: Now, you need to assign attributes to each of these entities like those given below:Īttributes: Email, User ID, Password, Mobile Number, Customer ID, Country Name, District, Address, Postal Code etc.Īttributes: Admin ID, Admin Name, PasswordĪttributes: Product code, Product name, Product category, product price, product availability.Īttributes: User ID, Username, Password, forgot password, sign upĪttributes: Product ID, Product name, Total Price, Billing products.Ĭonsider the rest of the entities like customers and products. This shows that the system is based on the software, and the main bridge between the customer and the store is the website or application. The entity sets for an online shopping system are:įirst of all, you need to start with the Mobile Application or website. Step 1: Identify all the entity sets related to your database. Now let’s follow a detailed strategy to help you build an online shopping system Step by Step.
How to Create an ERD for Online Shopping System Make sure your ERD can overcome all these constraints and is helpful in creating a system that is efficient and smart. The customers should be able to contact support in case of any delays or problems.
They should be able to see and download their receipts. The customer should be able to track their order through the unique shipment code.
The staff using the software should be able to download the customer’s information and shipments along with payment receipts. The system can track each customer and record their phone number, address and payment information. The system should keep track of each item with its unique code, price and product name. The system allows multiple customers to log in and browse the products.Įach product in the online shop has a unique ID or code.Ĭustomers can purchase products from multiple sections and add them to their carts.Ĭustomers can pay for their purchases through debit/ credit cards or cash. To understand this better, let’s look at the possible limitations while designing an Online Shopping System: These constraints should ensure a customer can easily log in and purchase items by paying the listed price. One of the significant problems in developing the shopping system is keeping in mind all the constraints. While designing an online shopping system database, you can encounter multiple problems. Image Source: Problems for Building an Online Shopping System You can track the purchase history of a customer or an item in an inventory through this graphical representation of your data. If your shopping database is quite large, an ERD like this one will help you track customers, their orders and deliveries. This ERD helps you look for data patterns in your database. This is an excellent way to manage your database especially if your orders are in a large quantity. The ER diagram mentions all their attributes and the relationships between them. Here’s a small ER diagram for online shopping that shows all the entities like customer, admin, order and product. Creating an ERD for a shopping system can be beneficial to ensure that all the important aspects are a part of your system. It gives the rough details of all the entities involved, from browsing to payment. This online shopping ERD maps out in detail all the critical entities, their attributes and relationships. Here are a few examples of taking inspiration from:
By linking entities, their attributes and their relationships, ERD helps determine all the requirements of an information system during its initial phase.Įntity Relationship diagrams are very useful in creating an online shopping system. Moreover, an ERD helps identify all the data that needs to be stored in the database. It allows you to map all the information in a graphical manner that is easy to understand and interpret. Using an ER diagram, you can resolve many problems during the planning phase of the information system rather than at the execution or testing phase. An ERD comes very handy here, where all entities are named and linked together to ensure the software caters to them all. You need to consider the user interface, admin interface, how the products will be identified and the whole billing process. You might be thinking, how is it related to Information systems? ER diagrams are handy in mapping out the functions the software will perform and how it will link different entities together.įor example, if you are making an online shopping system, you might have to look at the software from different perspectives. Now that you understand what an ER diagram is. ER Diagram Examples for Online Shopping Systems