with data redundancy there willbe more wastage of memory space as same type of data willbe saved many times when to want to see the data all duplicate results will come
Data redundancy does not have specific advantages. It only causes disturbance to our applications. Seeing duplicate entries on screen is a bad experience for the users and also multiple entries of...
1. Database may need completely redoing if a single field in one relational table has to be changed.
2. If an ERD is resolved incorrectly then it would have to be redone.