NoSQL databases such as Dynamo DB, Cassandra, and Mongo DB address the scaling and performance challenges that you often experience with a relational database. As the name suggests, NoSQL means a non-relational database. NoSQL databases store data without an explicit and structured mechanism to link data from different tables (no joins, foreign keys, and with normalization enforced).
NoSQL utilizes a number of data models including columnar, key-value, search, document, and graph. NoSQL databases provide scalable performance, high availability, and resilience. NoSQL typically does not enforce strict schema and every item can have an arbitrary number of columns (attributes), which means one row can have four columns, while another row can have ten columns in the same table. The partition key is used to retrieve values or documents containing related attributes. NoSQL databases are highly distributed and can be replicated. NoSQL databases are durable and don't experience...
