Operations to Build Customer Signatures
Customer signatures bring data together from disparate data sources, as suggested in Figure 13-4
Figure 13.4: The data in customer signatures needs to be brought together using a variety of processing methods.
Driving Table
The first step in building customer signatures is identifying the correct group of customers and the appropriate cutoff date. A customer signature has a set of conditions that determine whether any given customer should be in the signature. The table that defines these customers is the driving table, which may be an actual table or a subquery.
The driving table defines the population for the signatures and the cut off date. If the signatures are built only for customers who have been around for one year, then the driving table defines this population. Sometimes, filtering can be done after the customer signature has been created for all customers. Sometimes it is simpler to do it when building the signatures.
In an ideal...