Very helpful video! I have to make an ER model for a library for my course, but I can’t understand something! In my exercise it says that every book belongs to one or many categories, but one category maybe is a sub category from another, but only from another 1. How do I make this on ER ?
I am done library management system program but i dont understand how to create contex level 1st and 2nd level dfd and er diagram ,,,if u have pdf about librari management system er diagram and dfd plz give me....
Thanks Alot Brother..kal mera exam Ha DBMMS Ignou ka Mene ise bilkul bhi nahi padha...aur laafi videos dekhi..ussem lambi chodi theory lapet rakhi thi.. Aapki ERD ki video's dekhne ke baad ..ab kam se kam 10 mein 6-7 marks to mil jayengye Again Thanks..😄