Look at crowfoot notation. It works very visually.
@dani5123 жыл бұрын
This was really helpful thanks.
@dhruvishah74268 жыл бұрын
why do we add construct in association class topic?
@dhruvishah74268 жыл бұрын
And why we need to add association class, instead can't we just add decision and date to student class directly?
@mattzo34968 жыл бұрын
Perhaps to adhere to relation desgin theories, such as 4th normal form.
@rajeshwarparsi5 жыл бұрын
if it is a one-one relationship we can add decision and date to student class, however if same student is applying for multiple colleges (which is possible) we cannot have that columns in student class ,as is it ambiguous for which college the information is related to . Hope the explanation helps