How do you export information in the JIRA change history or display that history in a JQL?

Question

unknown · Answer

An issue's changelog can be accessed through the REST API, specifically with GET issue.

Leonard Chew · Answer

You cant do that with JQL. JQL only returns a list of issues.
What you can do is use the Activity Stream Gadget in a private Dashboard:

ActivityStream.png

See also How do I ask JIRA "what bugs have I modified in the last X days?"