Hi I believe that this question came up in relation to 
Generic Extractors (Which can be created on 
Table/View,Function Module and Infoset query). View is a 
combination of two or more tables with keys being commmon 
among these tables and doesn't hold phisical data. Function 
module is a modularization technique where in you pick data 
from different tables checking the data in these tables 
against certain conditions.

Added to the above answer, Function Module can even access 
the Pool tables, whereas View can not.