Hello Robert If your query contains a GROUP BY then you can only project grouped by > variables (or apply an aggregate over a non-grouped variable) >
I see. It's different from RDBs that treat grouped expressions as columns and hence could be used as such. > To get the behaviour you want you can use the SAMPLE aggregate which picks > one value for that variable from all the solutions in the group e.g. > ARQ 2.8.8 parsed it, however Virtuoso doesn't implement SAMPLE(). But thanks a million, now I sed that it is not a bug. dfcp
