Complete this sentence

Rows is to columns as ....

Question

Complete this sentence

Rows is to columns as ....

BlackTom AI · Accepted Answer

1. Identify and explain the relevant knowledge points and concepts
In a relational database, a table is organized into rows and columns. A row represents a single record (called a tuple in formal relational theory). A column represents a particular attribute of each record; those column cells are often referred to as fields. Thus row ⇄ tuple and column ⇄ field (or attribute).

2. Complete reasoning process step by step
- Step 1: Translate practical terms to formal relational terms: "row" → "tuple"; "column" → "field" (or "attribute").
- Step 2: The analogy "Rows is to columns as X is to Y" requires X to be the formal counterpart of "rows" and Y to be the formal counterpart of "columns".
- Step 3: Substitute the formal terms: rows → tuples, columns → fields. So the analogy becomes "tuples is to fields."

3. Intermediate mapping/details
- Row = tuple = one ordered set of values describing a single entity instance.
- Column = field/attribute = a named property; each tuple has one value per field.
- Therefore the pair mapping is (rows : columns) = (tuples : fields).

4. Explain WHY the correct answer is correct
"Tuples is to fields" preserves the exact type of relation: rows correspond to tuples and columns correspond to fields. The analogy structure (first term corresponds to the second term) is maintained: rows:columns :: tuples:fields.

5. Why the other options are incorrect
- "attributes is to fields": both terms refer to columns; this compares column-term to column-term, not row-to-column analogy.
- "fields is to tuples": reverses the mapping; fields correspond to columns, tuples correspond to rows, so this flips the order.
- "attributes is to entities": mixes a column concept (attributes) with a higher-level concept (entities are tables or real-world objects), so it does not match the row:column relationship.

6. Conclusion and confirmation
The correct analogy is "tuples is to fields," which matches the provided answer.

Complete this sentence Rows is to columns as ....单项选择题

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