You subtract one field with type D from another field with type D. What is the data type of the result?

When subtracting two fields of type D (date) in ABAP, the resulting data type is also D. This is because the operation being performed is mathematically subtracting one date from another, yielding the difference in days between those two dates. Since both operands are of the same type D, the output maintains that same type, which is a date that represents the subtraction result in terms of a date offset.

The potential choice of an integer (I) might stem from a misunderstanding of the nature of the operation. While it's true that subtracting dates results in a numeric difference, that difference is expressed relative to dates, and since both operands are dates, the operation retains the date data type for logical consistency and clarity. Therefore, the answer accurately reflects that when subtracting two date fields, the result remains in the date format.