When you join two database tables, which of the following rules applies to the database...

Comprehensive and Detailed Explanation From Exact Extract:

When performing a JOIN in ABAP SQL or CDS:

The key requirement is to specify the ON condition, which compares fields from the two tables, typically via equality (e.g., ON a.field = b.field). Hence, Option D is correct.

The fields do not need to have the same name (Option C is incorrect).

The position in the table structure is irrelevant (Option A is incorrect).

An alias name is optional, not mandatory (Option B is incorrect).