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System AWS Aurora Azure Cosmos DB
 Name AWS Aurora Azure Cosmos DB
 Version Version 4.2.8 NA
 Drawbacks NA 1.Most often compared with MongoDB. Unlike Mongo DB does not support joins 2.Managed Database which can be used only within Azure/Microsoft framework
 Advantages Managed RDBMS from AWS NA
 Languages Supported Content Management Interoperability Services (CMIS) .net, C#, Javascript
 Website aws.amazon.com/rds/aurora/ www.azure.microsoft.com/­services/­cosmos-db
 XML Support no no
 JSON Support yes yes
 Brief description Aurora is available as part of the Amazon Relational Database Service (RDS). Although it is a proprietary technology it offers MySQL compatible service since its release . This was made PostgreSQL compatible since October 2017 1.Globally distributed, horizontally scalable, multi-model database service 2.Earlier called Azure Document DB. Skype, Xbox uses this DB, Office, Active Directory and MSC (all Microsoft products)
 Database Model Relational Database Key Value DB
 Technical Documentation https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Aurora.Overview.html docs.microsoft.com/­en-us/­azure/­cosmos-db
 License Commercial commercial on azure cloud.
 Cloud-based / SaaS SaaS Service from AWS Azure Cloud based
 Implementation Language NA NA
 Operating System Supported Not Applicable as its managed by AWS Linux , OS X, Windows
 Options for Integration / Access API Restful HTTP Rest API , MongoDB drivers
 Consistency NA Eventual consistency
 Foreign Keys Yes No
 Streaming Support Yes No
 Analytics Support NA NA
 Data Storage Schema NA Multi Model Database
 Notable Users NA --
 Key Differentiator Supports MySQL as a SaaS service (Inno Db Engine). Disk Space provisioning done in 10 GB chunks automatically upto 64 TB. --
 Concurrency Yes --
 Partitioning No --
 Replication Yes --
 Secondary Indexes Yes based on secondary indexes using Solr --
 SchemaLess Yes --
 SQL Query No --