Question

A top-to-bottom relationship among the items in a database is established by a relational schema all of the listed options hierarchical schema network schema

Answer 1

Answer:

I can'understand this question

Answer 2

Answer:

A top to bottom relationship among the items can be best described by hierarchical schema as the hierarchical schema works from top to bottom in a parent child relationship manner. On the other hand Network Schema is used when the items at the same level has relationship with each other. For top to bottom relationship network schema is very complex , it is suitable only for many to many relationship.