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System CouchDB IBM DB2
 Name CouchDB IBM DB2
 Version 3.3.5 Last Stable Release 11.1 , released in april 2016
 Drawbacks 1 Does not have capabilities present in an RDF data store e.g does not support SparQL high license costs. Applicable for transaction systems in large enterprises
 Advantages NA ACID compliant.
 Languages Supported .net, C#, Javascript C C# C++ Cobol Delphi Fortran Java JCL Perl PHP Python Ruby Visual Basic
 Website apache.couchdb.org www.ibm.com/­analytics/­us/­en/­db2
 XML Support NA yes
 JSON Support yes yes
 Brief description Open Source Transactional database with native graph storage and processing IBM Db2 was the name introduced by IBM in 1983. The names DB2(tm) and Db2(tm) refer to database-server products developed by IBM. IBM Researchers invented Relational model and SQL Format.
 Database Model Property Graph Primarily a relational database
 Technical Documentation docs.microsoft.com/­en-us/­azure/­cosmos-db www.ibm.com/­support/­knowledgecenter/­SSEPGG
 License Community license can be run on 1 node.Enterprise License supports multi-node cluster deployment Commercial
 Cloud-based / SaaS Amazon AMI available, On Prem can be installed Available in AWS, Azure Clouds. Available as a SaaS option in IBM Cloud
 Implementation Language Java API C,C++
 Operating System Supported Linux , OS X, Windows Linux Windows
 Options for Integration / Access API Rest API JSON Query, Xquery, JDBC, ODBC
 Consistency NA Highly Consistent
 Foreign Keys No Yes
 Streaming Support No No
 Analytics Support No Need to buy Netezza
 Data Storage Schema Key Value Store presented as Document DB Relational Database
 Notable Users -- Most of the Fortune 500 Companies
 Key Differentiator -- Go To Database for IBM Mainframe Systems
 Concurrency -- Yes
 Partitioning -- No
 Replication -- Yes
 Secondary Indexes -- Yes
 SchemaLess -- No
 SQL Query -- Yes