How it is possible to create JQL request which shows all unreleased tickets?

[Iaroslav NAKONECHNIKOV]

Hello, 

as i read Example JQL queries for board filters | Jira Software Cloud | Atlassian Support i don't get how to find all tickets with defined versions, which were unreleased?

earliestUnreleasedVersion() gives tickets only with first unreleased version. 
and ignores all other. 

also, i don't see any filter by "release" itself...  So how it is possible to get list of all, where version assigned, but not released yet?

[Iaroslav NAKONECHNIKOV · Accepted solution]

ok, i found: fixVersion in unreleasedVersions()
described: https://confluence.atlassian.com/jirasoftwareserver0820/advanced-searching-1095249245.html