java - Hibernate GROUP BY invalid for Oracle -


i created hibernate query this:

select new projectforuser   (p.projectid, p.name, p.description, p.client, p.startdate, p.enddate,    p.livedate, p.projectstate, p.overallragstatus, p.scoperagstatus, p.flt,    up.projectmanager)  userprojectassociation left join up.project p  up.user.id = :userid , up.project.projectstate != 'archived'  group p.projectid

to retrieve projects user. projects stored in 1 table, users in other , userprojectassociation joining table additional attribute - projectmanager.

the whole query works fine h2 database, on oracle error: 

ora-00979: not group expression

what correct way use group oracle?

thanks!

the problem. ora-00979 occurs when group clause not contain expressions in select clause. select expression not included in group function must listed in group clause. these avg, count, max, min, sum, stddev, , variance.

see: https://www.tekstream.com/resources/ora-00979-not-a-group-by-expression/


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