12.1.3 : questions - How to identify the product code levels and which product family a product belo

This thread will answer your following questions -

I was trying to apply a patch 17855007, and it showed that the following required code levels.

•R12.AD.B.delta.3

•R12.ATG_PF.B.delta.3

•R12.PJ_PF.B.delta.3

Q1. What is the best way to identify the current code levels generally?

Q2. I ran the following queries. Can I assume that we have met the requirement for "R12.PJ_PF.B.delta.3"?

SQL> select PATCH_LEVEL from FND_PRODUCT_INSTALLATIONS where patch_level like 'R12.PJ%';

R12.PJI.B.3

R12.PJM.B.3

Q3. Does B.delta.3 mean B.3? What does the "delta" mena in the requirment names.