フリー問題

問題文

A grouped query also selects a field that is neither grouped nor wrapped in an aggregate, and the server runs with the modes it ships with. What does the server do with that query?

選択肢

1. The server therefore sorts the hidden remainder as it plans the grouped presentation.
2. The server therefore duplicates the outer expression as it plans the grouped presentation.
3. The server therefore rejects the ambiguous projection as it plans the grouped presentation.
4. The server therefore chooses the random member as it plans the grouped presentation.