Describe a situation where using NoSQL databases would be preferable over relational solutions.

Using NoSQL databases is preferable in situations where:

• Data has a flexible or unstructured schema, such as JSON documents with varying structures.
• High scalability and distribution are required, especially with large volumes of data and high load.
• Fast processing of large data streams (big data) or real-time data handling is needed.
• Data with nested or hierarchical structures needs to be stored and quickly retrieved.

Example: if you are developing a logging system where record structures can change, or a social network with diverse content types, NoSQL (e.g., MongoDB) will be more convenient and efficient than traditional relational DBMS.