You can create your own JQL functions using a free plugin such as Script Runner.
To get the data from Jira database, find the id of your custom field using
select * from customfield
Then use something like this
select
pkey
, summary
, datevalue
from
customfieldvalue c
, jiraissue i
where
i.id=c.issue
and c.customfield = 10071
and c.datevalue in (select min(datevalue) from customfieldvalue where customfield = 10071)