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System AWS DynamoDB Microsoft SQLServer
 Name Amazon DynamoDB Microsoft SQL Server
 Version released Jan 2012 Sqlserver 2017
 Drawbacks Very few features when compared to other key-value stores high license costs. Applicable for transaction systems in large enterprises
 Advantages Managed Database Service provided by a leading cloud provider ACID compliant. Easy to use User Interface
 Languages Supported Java, Node.js, Go, C# .NET, Perl, PHP, Python, Ruby, Haskell and Erlang. C# C++ Delphi Go Java JavaScript (Node.js) PHP Python R (Microsoft R) Ruby Visual Basic
 Website aws.amazon.com/­dynamodb www.microsoft.com/en-us/sql-server
 XML Support no yes
 JSON Support yes yes
 Brief description Amazon DynamoDB is a fully managed proprietary NoSQL database service that supports key-value and document data structures[2] and is offered by Amazon.com as part of the Amazon Web Services portfolio As a database server, it is a software product with the primary function of storing and retrieving data as requested by other software applications—which may run either on the same computer or on another computer across a network (including the Internet).
 Database Model Key Value Model Primarily a relational database
 Technical Documentation aws.amazon.com/­documentation/­dynamodb docs.microsoft.com/­en-ie/­sql/­sql-server/­sql-server-technical-documentation
 License commercial on aws cloud. Commercial
 Cloud-based / SaaS Yes but you can download dynamod db locally as well. Local installation does not have vendor support Available in AWS, Azure Clouds. Available as a SaaS option in Microsoft Cloud
 Implementation Language C++ C,C++
 Operating System Supported Linux , OS X, Windows Linux Windows
 Options for Integration / Access API Rest API OLE DB, Tabular Data Stream (TDS), ADO.NET, JDBC, ODBC
 Consistency Immediate consistency Highly Consistent
 Foreign Keys No Yes
 Streaming Support No No
 Analytics Support NA Need to buy SQLServer Analytics Pack (SSAS)
 Data Storage Schema Key Value Model Relational Database
 Notable Users As per Amazon the solution has been deployed by around 100,000 customers Most of the Fortune 500 Companies
 Key Differentiator Amazon allows developers to purchase a service based on throughput, rather than storage. Highly reliable as a transactional database
 Concurrency Yes Yes
 Partitioning Sharding No
 Replication Multi Data Center Replication supported Yes
 Secondary Indexes Yes Yes
 SchemaLess Yes No
 SQL Query No Yes