Exact means exact
Every cell in a row must match. Similar names, different capitalization, or extra spaces are not treated as duplicates.
Count and remove completely identical data rows. The header and first occurrence stay exactly where they are.
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Every cell in a row must match. Similar names, different capitalization, or extra spaces are not treated as duplicates.
The heading row is never compared with the data. Of repeated data rows, the first occurrence is kept.
This first version avoids guessing whether two customers or products are the same. That protects meaningful differences.