How T Draw An E-r Diagram?
An ER Diagram is often used to plan and communicate information about how a database is structured so people creating the database and using the database will understand how the data relates inside of it. A good basic explanation with some examples of ER diagrams can be found on the wikipedia page: en.wikipedia.org Before drawing an ER diagram, you must first understand how data in the database is related. A well-designed database is one that minimizes space used, maximizes performance, and minimizes fields of “Not Applicable” data. Thus, different tables are created in a database containing objects. The objects can be associated with zero, one, or many other pieces of data. For example, let’s say you are working at a Vet’s office and creating a database to contain customer information. Your customers may have one or more pets of varying types. You will need to store information about the customer themselves (such as their name, phone number, etc), and information about any pets that t
