A data analyst is working with a system that stores data in flexible, JSON-like documents instead of rigid tables with predefined columns and rows. Which of the following database models does this system represent?
Data mart
Non-relational
Relational
OLAP cube
Non-relational databases, which include document-oriented databases, are designed for flexibility. They store data in formats like documents or key-value pairs, which do not require a predefined schema with fixed columns and rows. This contrasts with relational databases, which enforce a strict, table-based structure. Since the system uses flexible, document-like structures, it is a non-relational database.
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