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Validating Messy Banking Data

MediumSQL & Data Manipulation00:00
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Your question is Validating Messy Banking Data. Take a moment with it on the right.

Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).

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Problem

Walk me through your approach to data validation when working with large, messy datasets from multiple legacy banking systems at Regions.