Many companies' data originate from both internal and external sources. Have you faced any obstacles in the past when trying to integrate a new external data source into the existing infrastructure? If so, how did you overcome these obstacles?

"In my experience, external data integration issues have usually stemmed from differing systems that created data in a format different from that of our company data. It would be ideal if we could all have the same systems to avoid this issue, but that was cost prohibitive. Instead, I created a script that ran before the data was uploaded to our data warehouse tables. This script changed the format of the external data and ran tests to ensure that it was in a format compatible with our systems."