Which of the following is not considered a reusable data set?

The concept of reusable data sets typically refers to data that can be utilized across multiple analyses or applications without modification, enhancing efficiency and consistency. A date table is a prime example of a reusable data set because it provides a standardized reference for time-related analysis, applicable to various datasets and analyses.

Postal code data also falls into the category of reusable data as it serves a consistent purpose in geographic and demographic analyses. Customer demographics are similarly reusable since they provide vital information that can inform various analytical processes, such as market segmentation and targeted marketing.

Order transactions, on the other hand, represent specific interactions between customers and a business, containing detailed information tied to individual sales. This data set is often unique to particular analyses focused on purchasing behavior, sales trends, or inventory management, and is less likely to be reused in a variety of contexts compared to the other options. Therefore, it is identified as the data set that does not lend itself to reuse in the same way as the others, making it the correct choice in this scenario.