DBMS > Kdb vs. MySQL vs. Oracle NoSQL
System Properties Comparison Kdb vs. MySQL vs. Oracle NoSQL
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|Editorial information provided by DB-Engines|
|Name||Kdb Xexclude from comparison||MySQL Xexclude from comparison||Oracle NoSQL Xexclude from comparison|
|Description||High performance Time Series DBMS||Widely used open source RDBMS||A multi-model, scalable, distributed NoSQL database, designed to provide highly reliable, flexible, and available data management across a configurable set of storage nodes|
|Primary database model||Time Series DBMS||Relational DBMS Key/Value like access via memcached API||Document store|
|Secondary database models||Relational DBMS||Document store|
|Developer||Kx Systems, a division of First Derivatives plc||Oracle since 2010, originally MySQL AB, then Sun||Oracle|
|Initial release||2000 kdb was released 2000, kdb+ in 2003||1995||2011|
|Current release||3.6, May 2018||8.0.32, January 2023||22.3, December 2022|
|License Commercial or Open Source||commercial free 32-bit version||Open Source GPL version 2. Commercial licenses with extended functionallity are available||Open Source Proprietary for Enterprise Edition (Oracle Database EE license has Oracle NoSQL database EE covered: details)|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Implementation language||q||C and C++||Java|
|Server operating systems||Linux|
|Data scheme||yes||yes||Support Fixed schema and Schema-less deployment with the ability to interoperate between them.|
|Typing predefined data types such as float or date||yes||yes||optional|
|XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.||yes||yes||no|
|Secondary indexes||yes table attribute 'grouped'||yes||yes|
|SQL Support of SQL||SQL-like query language (q)||yes with proprietary extensions||SQL-like DML and DDL statements|
|APIs and other access methods||HTTP API|
Proprietary native API
|RESTful HTTP API|
|Supported programming languages||C|
|Server-side scripts Stored procedures||user defined functions||yes proprietary syntax||no|
|Triggers||yes with views||yes||no|
|Partitioning methods Methods for storing different data on different nodes||horizontal partitioning||horizontal partitioning, sharding with MySQL Cluster or MySQL Fabric||Sharding|
|Replication methods Methods for redundantly storing data on multiple nodes||Source-replica replication||Multi-source replication|
|Electable source-replica replication per shard. Support distributed global deployment with Multi-region table feature|
|MapReduce Offers an API for user-defined Map/Reduce methods||no similar paradigm used for internal processing||no||with Hadoop integration|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency||Eventual Consistency|
Immediate Consistency depending on configuration
|Foreign keys Referential integrity||yes||yes not for MyISAM storage engine||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no||ACID not for MyISAM storage engine||configurable ACID within a storage node (=shard)|
|Concurrency Support for concurrent manipulation of data||yes||yes table locks or row locks depending on storage engine||yes|
|Durability Support for making data persistent||yes||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||yes||yes||yes off heap cache|
|User concepts Access control||rights management via user accounts||Users with fine-grained authorization concept no user groups or roles||Access rights for users and roles|
|More information provided by the system vendor|
|Specific characteristics||Integrated columnar database & programming system for streaming, real time and historical...|
|Competitive advantages||provides seamless scalability; runs on industry standard server platforms; is top-ranked...|
|Typical application scenarios||tick database streaming sensor data massive intelligence applications oil and gas...|
|Key customers||Goldman Sachs Morgan Stanley Merrill Lynch J.P. Morgan Deutsche Bank IEX Securities...|
|Market metrics||kdb+ performance and reliability proven by our customers in critical infrastructure...|
|Licensing and pricing models||upon request|
We invite representatives of system vendors to contact us for updating and extending the system information,
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