I have several custom fields (around 250) and some of them are not being used anymore (but may have some value or not).
JIRA customfield interface is not very good to find inactive custom fields (like it work to find inactive workflows).
I would like to query database to list all customfields (id or name) that are not applied in any screens.
After that I will check if the field has some value (JQL) and if it is OK to be deleted (maybe the value was migrated to a new field).