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System Cassandra (Datastax) Oracle DB
 Version 2.1 12c
 Drawbacks Paid Version, License Fees, Support Fees costly. You get comparable performance with open source rdbms databases
 Advantages DB Failover capability, Enterprise support available Robust. Long proven history. Remote connections very stable
 Website www.datastax.com https://www.oracle.com
 XML Support Not Available.Generally not available in NOSQL DB. Well known RDBMS have this feature yes
 Languages Supported C C# C++ Java Node.js PHP Python Ruby C, C++
 Name Cassandra (Datastax) Oracle DB
 JSON Support yes yes
 Brief description DataStax was built on the open source NoSQL database Apache Cassandra. Cassandra was initially developed internally at Facebook to handle large data sets across multiple servers. It was released as an Apache open source project in 2008 It is a database commonly used for running online transaction processing (OLTP), data warehousing (DW) and mixed (OLTP & DW) database workloads
 Database Model Primarily a NoSQL database Primarily a relational database
 Technical Documentation docs.datastax.com docs.oracle.com/en/database
 License Commercial Commercial
 Cloud-based / SaaS Virtual Machine Images available in AWS and Azure Marketplace. Available as a Hybrid Cloud SaaS Option - NA Available in AWS, Azure Clouds. Available as a SaaS option in Oracle Cloud
 Implementation Language C,C++ C,C++
 Operating System Supported Linux, OS X, AIX HP-UX Linux OS X Solaris Windows z/OS
 Options for Integration / Access API CQL (Cassandra Query Language is like SQL) Gremlin Rest API (Oracle Lite), Oracle Call Interface (OCI) JDBC ODBC
 Consistency Highly Consistent Highly Consistent
 Foreign Keys No Yes
 Streaming Support Yes No
 Analytics Support One of the core features is to build timeseries apps Need to buy Exadata (high cost)
 Data Storage Schema Key Value Column Family NoSQL DB Relational Database
 Notable Users Samsung Smartthings, ING Vysya , Safeway Most of the Fortune 500 Companies
 Key Differentiator Graph DB built natively on top of the core NoSQL Column Store. Graph and NoSQL component share the same core. Enterprise version of Cassandra supports HighAvailability (HA) Highly reliable as a transactional database
 Concurrency Yes Yes
 Partitioning Yes No
 Replication Yes Yes
 Secondary Indexes Yes Yes
 SchemaLess Yes No
 SQL Query No, but CQL is similar to SQL Yes