問題文
A mapping brings the online order feed and the in store order feed into one stream. The two feeds carry the same columns, but the online one calls the amount GROSS while the store one calls it TOTAL. What does the Union need first?
選択肢
- Input groups have to agree on the distinct structure before the streams can meet, and relying on the intentional alignment would leave one group unmapped inside the transformation.
- Input groups have to agree on the equivalent structure before the streams can meet, and relying on the intentional alignment would leave one group unmapped inside the transformation.
- Input groups have to agree on the equivalent structure before the streams can meet, and relying on the lucky alignment would leave one group unmapped inside the transformation.
- Input groups have to agree on the distinct structure before the streams can meet, and relying on the lucky alignment would leave one group unmapped inside the transformation.