Azure Cosmos DB
Introduction
An Azure Cosmos DB is a document-oriented and a non-relational database. It does not model data in tabular format instead the data resides in a document form which is a JSON format. So unlike the SQL server, the data in cosmos DB does not reside in the table-column structure.
It extends Azure DocumentDB which was released in 2014. it is schema-less and generally classified as a NoSQL database. Azure Cosmos DB is Microsoft’s proprietary globally-distributed, multi-model database service "for managing data at the planet-scale" launched in May 2017. It uses query language similar to SQL and supports ACID property of transactions.