NoSQL DB

NoSQL stands for “not only SQL” and refers to a type of database that does not use a fixed schema or rely on the structured query language (SQL) for querying data. NoSQL databases are designed to handle large amounts of unstructured or semi-structured data and are often used in big data and real-time web applications.

NoSQL databases can be categorized into different types based on their data model, including:

• Document databases, store data in semi-structured documents, such as JSON or XML. Examples include MongoDB and Couchbase.
• Key-value databases, store data as a collection of key-value pairs. Examples include Riak and Redis.
• Column-family databases, which store data as a collection of column families. Examples include Apache Cassandra and HBase.
• Graph databases, which store data as nodes and edges in a graph. Examples include Neo4j and Amazon Neptune.