Requesting, Preparing, and Transforming Data

Free CPA AUD (Auditing & Attestation) lesson in Performing Further Procedures and Obtaining Evidence. 14 min read, ~2,115 words.

A data extraction request must specify attribute structure, format, source, and time period. Relational databases link tables by primary and foreign keys; the schema tells you what to ask for. Measurement scales (nominal, ordinal, interval, ratio; continuous, discrete) determine which arithmetic is valid. Transformation (cleansing, normalization, joining, aggregation) introduces risk...

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