I am currently progressing into my dissertation at City University London. And my topic focuses on ERP databases and therefore, I need some information about this which will help me in my dissertation.

Following are the 3 important questions I am looking answers for:
1) ERP vendors like SAP use Oracle/DB2 to store their client's ERP data.This data is mostly stored in internal data centres.Could these ERP databases which are often very huge and critical be stored on clouds?

2)What could be the possible issues if ERP data is stored on cloud?

3)How safe ERP data would be on cloud as the company owing the data wont be having complete ownership of its data if moved to cloud?

Your answers to any of these questions would greatly help me in my dissertation.

Many Thanks in Advance,