Which term is NOT commonly used to refer to a single row in a data table?

• A. Datum
• B. Record
• C. Row
• D. Tuple

Answer: (A)

In data tables, a single row represents one entity’s entire set of values across all attributes, so the common terms for that unit are a row, a record, or a tuple. A datum, on the other hand, is a single value or data item within the row, not the whole row itself. So the term that is not used to refer to the entire row is datum, since it denotes an individual piece of data rather than the complete collection of values for one observation. The other terms fit because they convey the idea of the whole row of values for one entity.