I'm sharing the one that finally worked after a lot of attempts.

Thank you. The first part of your answer is what I was looking for, but the second part is too much better, so thank you again.

Yes, we are currently using V12.2.3.0.0-20170621001724. This is the lastest version. However Oracle just released their all new OACS.

For sure the mistake is trying to make the connection with a trial version of DVCS. You could try to use DVD (Data visualization Desktop) and if it fits your needs then you can proceed to make the purchase of DVCS.

I have done what you suggest like this: However it is not counting only the 'Yes' this calculation is counting all registers.