hibernatejpajpa-2.0hql

HQL combined "distinct" and "order by"

This query works if I remove the "distinct" or the "order by", but it does not work combined. I am trying to follow examples. Can you please explain this?

String queryString = "select distinct event.county from Event as event order by event.county.county"

[main] - [ERROR] SqlExceptionHelper.logExceptions():144 >> ERROR: for SELECT DISTINCT, ORDER BY expressions must appear in select list
  Position: 215

Generated SQL

select distinct county1_.Id as Id4_, county1_.County as County4_ from Event event0_ inner join County county1_ on event0_.CountyID=county1_.Id cross join County county2_ where event0_.CountyID=county2_.Id order by county2_.County
Solution

  • Try with

    select distinct county from Event event
inner join event.county county
order by county.county