How automatically compare response data with database data?

Hi,

I am quite new to SoapUI and I am testing web services which add/edit data in database. How I could automatically compare response data and data in database to make sure that web service works correctly.

Example scenario1:
Requirement: WebService generates random string, records it to db and returns it as response.
In test I would like:
Call webService and get response (new generated string)
Check if response from webService (new generated string) is actually in DB (if programmer added it correctly to db).

Example scenario2:
Requirement: webservice edits data for defined ID.
In test I would like:
call webService with ID as input and get response changed data for that ID (e.g. number, if i want to increase it with every call)
check if response from webService (the number) is the same as in DB (was changed in db too).

Thanks for tips in advance.

Vaidas