問題文
One requirement computes a margin from fields on the same row; another computes a running total across ordered rows. Which nodes handle each?
選択肢
- augment for the margin and filter for the running total.
- computeExpression for both, because it can look across ordered rows too. A running total would be produced without ever declaring how the rows are ordered or partitioned.
- computeExpression for the same-row margin and computeRelative for the value computed across ordered rows.
- computeRelative for both, because all margin and running total calculations look across ordered rows anyway.