To integrate two datasets from customer databases based on their join dates, which node would you use?

To integrate two datasets from customer databases based on their join dates, the most suitable choice is to use the Append node. This is because the Append node is specifically designed to combine two datasets with the same structure into a single dataset by adding the rows from the second dataset to the end of the first.

In scenarios where you're focusing on integrating data based on a common attribute like join dates, you're likely looking to integrate records that may either be new entries or additional data points for existing records from the two datasets. The Append function enables you to effectively stack the datasets vertically, ensuring that you maintain all records together while preserving the context of their respective join dates.

On the other hand, other options do not align as closely with the task. The Merge node is more appropriate for combining datasets based on common keys or attributes, rather than stacking them, which is not the primary goal in this case. The Sample node is used to create a subset of a dataset, which does not serve the purpose of integration. The Sort node organizes data in a specified order but does not combine datasets either. Thus, using the Append node is the best approach to integrate the two datasets based on join dates.