Explanation:
The same set of columns.
In relational databases, a row is a data record within a table. Each row, which represents a complete record of specific item data, holds different data within the same structure. A row is occasionally referred to as a tuple.
Incorrect:
Not: a key value pair.
Unlike relational databases, key-value databases do not have a specified structure. Relational databases store data in tables where each column has an assigned data type. Key-value databases are a collection of key-value pairs that are stored as individual records and do not have a predefined data structure.
Reference:
https://www.techopedia.com/definition/4425/database-row
https://www.techtarget.com/searchdatamanagement/tip/NoSQL-database-types-explained-Key- value-store