The solution must account for both updates and deletions in the source data to meet the requirements. While enabling Change Tracking and querying the CHANGETABLE function can help identify updated rows, it does not account for rows that have been deleted. The instructions specify that if a row is deleted in any of the sources, the IsDisabled column should be set to True in the data warehouse. Thus, relying solely on Change Tracking to capture updated rows is insufficient, as it does not fulfill the requirement of tracking deletions.
The solution only addresses changes made to the ReferenceNr column by querying the change tracking function for updated rows and setting the IsDisabled column to True. However, it does not cover the requirement of handling rows deleted in any of the source databases. Therefore, this solution does not fully meet the goal of loading data into the data warehouse nightly while accounting for both updates and deletions.