Question

What is the need of data preprocessing in data warehouse?

Answer 1

To mention records and making data handy for giving informations at the time of requirement

Answer 2

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Data preprocessing is a data mining technique that involves transforming raw data into an understandable format. Real-world data is often incomplete, inconsistent, lacking in certain behaviors or trends, and is likely to contain many errors. Data preprocessing is a proven method of resolving such issues.