To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) Transaction Number, bill of lading number, invoice number may be degenerate dimensions (DD) - This option is correct. Degenerate dimensions are those attributes that are not associated with any dimension table but are still important for analysis. Transaction Number, bill of lading number, and invoice number are examples of degenerate dimensions that can be used for analysis purposes.
Option B) Degenerate dimensions have no attributes - This option is incorrect. Degenerate dimensions can have attributes that are relevant to the analysis being performed. For example, a transaction number may have attributes such as transaction date, transaction amount, etc.
Option C) Degenerate dimensions do not join to actual dimension table - This option is correct. Degenerate dimensions are not joined to any dimension table because they do not have a relationship with any dimension. They are standalone attributes that are used for analysis.
Option D) All of the above are correct - This option is correct. All the statements mentioned in options A, B, and C are correct. Degenerate dimensions can include attributes such as transaction number, bill of lading number, and invoice number. They do not have any attributes of their own and do not join to any dimension table.
Therefore, the correct answer is D) All of the above are correct.