Regarding migrating Data on HCP DB service

Hello Experts,

Regarding use Case for DB services on HCP, few queries:

1. How do customers migrate there own data from legacy systems in to HCP?, Is there any tools/accelerators built to do this.

2. If not, DB services on HCP is only used to host new application and new data what about the old applications/Data.

3. maybe a foolish question here but if i want to migrate my Business warehouse into HCP and build application or use Business object cloud on top of it.. can this be achieved.

please help