In which condition would you place the correct ON condition for a CDS definition?

In the context of Core Data Services (CDS) views, the ON condition defines how two tables or data sources are linked to each other, usually through a key or a common field. The correct choice focuses on the proper alignment and accuracy of these key columns between the sources involved in the join operation.

In this case, the condition that links the two sources is represented as "_Source1.carrier_id = _Source2.carrier_id." This condition properly uses the key "carrier_id" from both data sources, ensuring that the join is performed based on the correct relationship defined by the common identifier. This is crucial for maintaining data integrity and ensuring that the results returned in the CDS view reflect accurate relationships between the entries from both sources.

Using a projection variable (like $projection) is appropriate when dealing with selected fields in a projection or view context, but the key aspect lies within directly confirming the join condition aligns with the proper data source fields. Therefore, having the identifiers clearly defined in the form of "_Source1" and "_Source2" is critical for expressing how data from these sources interrelate, aligning with established relational database practices.

Other options either use improper syntax, incorrect field names, or a mismatch that could lead to errors