Difference between conceptual logical and physical data model

CMIS 320 Project 2

1. Difference between conceptual logical and physical data model:
https://www.youtube.com/watch?v=RJ9TpkWKyU0&t=26s
2. ER Diagramming using ERAssistant: https://www.youtube.com/watch?v=a6UCXWJZ2GE
3. ER Diagramming using Visio:
https://www.youtube.com/watch?v=597BVMtMZ1w&t=568s