When creating a calculation view that accesses a table in an external schema:
* A. Synonym: Synonyms act as aliases to access external schema objects. They are required to integrate external tables into the calculation view.
* D. Authorization: You need appropriate schema authorizations to access the external table through the synonym.
A remote source (B) is used for accessing remote systems, and an SQL view (C) is not necessary for this scenario.

To fill the input parameters of a table function in a calculation view:
* Define constant values (A):Assigning constants directly ensures that static values are passed to the table function.
* Map columns from lower nodes (D):Input parameters can dynamically take values from columns in lower-level nodes.
* Create and map an input parameter (E):Defining an input parameter in the calculation view and mapping it to the table function provides flexibility and parameterization for the logic.
Options B and C are not valid as procedures or hierarchy nodes are not applicable in this context.(Reference:
SAP HANA Calculation View Modeling Guide)

To identify companies that sold products in both January and February, anIntersect Nodeis optimal. It compares two datasets and retrieves only the records that exist in both. In this scenario, the intersect node ensures that only companies with sales in both months are included in the output.

A build failure with a namespace-related issue often occurs because:
* B. The imported calculation view and its data source have different namespaces: Both must match for the view to reference the table correctly.
* C. The namespace used in the calculation view to reference the table is different from the actual namespace in the table's identifier: The reference must exactly match the namespace in the table definition.
The issue is unrelated to sub-folder rules (A) or differing.hdinamespacefiles (D).