You have created a CDS view and used alias names for some of
its elements. In which of the following cases is the alias name
mandatory? Note: There are 3 correct answers to this question.
A. SUM( revenue ) AS total_revenue
B. CAST( 'USD' AS abap.cuky ) AS currency_key
C. crtdby AS created_by
D. CASE ordertype WHEN 'A' THEN 1 ELSE 0 END AS
order_type
E. ASSOCIATION TO sflight AS _flights
