Learn how to find and remove duplicate product listings using identifiers, composite keys, fuzzy matching, variant checks, and controlled master-record selection....
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Learn how to clean Excel data with Power Query using repeatable steps for text cleanup, data types, dates, duplicates, missing values, file combining, and validation....
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Learn how to clean CSV data before database import by validating encoding, fields, dates, numbers, duplicates, categories, and staging rules....
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A spreadsheet can look organized while quietly accumulating errors that make reports, customer records, inventory lists, research datasets, and financial summaries unreliable. Data entry mistakes are especially difficult to manage...
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