問題文
An Aggregator is added to a mapping with a maximum expression, but the developer leaves the list of fields to group on empty. The mapping is valid and it runs. How many rows come out of that transformation?
選択肢
- With nothing named to group on, the output collapses to the untouched row, and expecting the preserved count would mistake the transformation default for no aggregation at all.
- With nothing named to group on, the output collapses to the sole row, and expecting the shrunken count would mistake the transformation default for no aggregation at all.
- With nothing named to group on, the output collapses to the sole row, and expecting the preserved count would mistake the transformation default for no aggregation at all.
- With nothing named to group on, the output collapses to the untouched row, and expecting the shrunken count would mistake the transformation default for no aggregation at all.