The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus
A logical schema is a data model described in terms of data management technology , where as a physical schema describes how data is represented and stored . For more information and practise on logical schema and physical schema visit http://www.avatto.com/computer/exam/mcqs/questions-answers/database/71/1.html