Which of the following is TRUE about columnar storage in NoSQL databases?

In the context of NoSQL databases, columnar storage is designed to improve performance for analytical queries. The correct statement highlights that this storage approach organizes data by columns, rather than rows. This columnar format allows for efficient reading of data since analytical queries often require calculations across a few columns but involve a large volume of rows. By storing data in columns, the database can quickly access only the relevant data needed for processing those queries, thus significantly speeding up performance.

This design is particularly beneficial in scenarios where aggregations and computations on specific attributes (like sums, averages, etc.) are frequent, as it optimizes how data is accessed and processed.