Can someone help me with Databases? Watch
The problems i have to do are
Changing of data types
Renaming of fields
Why do they occur and how can you prevent and solve them?
Thanks for any help.
For poor normalisation it is all in the repeating groups, for example having one whole table for student and courses. one student can take many courses (having student name listed down several times (not good), so you remove them to create 2 tables. one for student and one for course. Of course having any relationships as well (i.e foreign key so student id is a foreign key in the course table).
Hope it helps
As said above- it is to do with the developers.