How to perform .Max() on a property of all objects in a collection and return the object with maximum value [duplicate]

Answer 1

In NHibernate (with NHibernate.Linq) you could do it as follows:

return session.Query()
              .Single(a => a.Filter == filter &&
                           a.Id == session.Query()
                                          .Where(a2 => a2.Filter == filter)
                                          .Max(a2 => a2.Id));

Which will generate SQL like follows:

select *
from TableName foo
where foo.Filter = 'Filter On String'
and foo.Id = (select cast(max(bar.RowVersion) as INT)
              from TableName bar
              where bar.Name = 'Filter On String')

Which seems pretty efficient to me.