That can be done - REST can be used by any language that supports doing the calls. Could you explain what you are asking?
Say, I have an issue "XYZ1" , the API call gives me a JSON Response(lots of unnecessary fields), which I want to store a few fields like Status,Assignee,Reporter,etc. in my database (say Oracle/MongoDB).
I am facing difficulty in :
Can you guide me how to go about this?
That's not really a JIRA question - you're getting the issue data from the API call - what you do with it is up to your code.
On your difficulties
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