Discussion
Data scrubbing is which of the following?
Answer: D
Correct answer: A process to upgrade the quality of data before it is moved into a data warehouse
Scrubbing happens on the way in, during the transformation stage, because the warehouse is meant to be the trustworthy source and cleaning it afterwards would mean queries had already run against bad data. It corrects misspellings, resolves conflicting codes and fills or flags missing values.
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