Define the duplicate comparison before cleanup

The source describes the built-in Data, Data cleanup, Remove duplicates command. Select the records, indicate whether headers are present, and choose which columns define a match. Those settings determine which rows are treated as repeated. Review them before confirming the operation, because two entries sharing one value may still contain different and necessary information in other fields.

Use a separate unique result when that is safer

The article also discusses the UNIQUE function as another way to produce distinct entries. That approach creates a result instead of requiring the same direct cleanup of the original records. Decide whether the task is to revise the source table or provide a deduplicated view for another use. Preserve information that still needs inspection, and check the resulting rows against the intended duplicate definition rather than relying only on the reported removal count.

Choose Between Removing Repeats and Returning Unique Results