Is there a way to detect if issues have been linked as duplicate via JQL

[Randy]

Is there a JQL query that will detect issues that have been linked as duplicate or marked as duplicate through a workflow transition?

This might be 2 questions I guess. Thanks in advance for any help.

[Randy · Accepted solution]

I forgot to mention an important requirement that I need to see which were duplicated within the last 2 weeks.

The below is what I have ...

project = "TEST" AND issuetype = Bug and issuefunction in hasLinkType("Duplicate")

But is it possible to check to see if that duplicate was created less than 2 weeks ago?