REST API GET_REQUESTS column filtering

REST API GET_REQUESTS column filtering

In SDP v9.2, I need to use the GET_REQUESTS operation to page through all requests.

I have some questions:
  1. How can I specify which columns I want to return? I only want "workorderid", "status", "createdtime", "resolvedtime", and "completedtime".
  2. How can I know how many total requests are available? The result does not say.
Can you please also point me to good API documentation for v9.2 of your product? Particularly all information related to using JSON.

Thank you.
Jason