Is there some way of producing a list of Jira issues that DO NOT have 1 label?
In almost any incarnation of SQL, the pseudo-code would be something akin to the following trivial code excerpt
SELECT something
FROM somewhere
GROUP BY label
HAVING COUNT(*) <> 1;
According to page 4 of the JQL manual, as minimal as it is yet also devoid of any useful example or any indication of the JQL language syntax or grammar, HAVING is a JQL keyword.
Mike