DBMS > Derby vs. DolphinDB vs. EDB Postgres
System Properties Comparison Derby vs. DolphinDB vs. EDB Postgres
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|Editorial information provided by DB-Engines|
|Name||Derby often called Apache Derby, originally IBM Cloudscape; contained in the Java SDK as JavaDB Xexclude from comparison||DolphinDB Xexclude from comparison||EDB Postgres Xexclude from comparison|
|Description||Full-featured RDBMS with a small footprint, either embedded into a Java application or used as a database server.||DolphinDB is a high performance Time Series DBMS. It is integrated with an easy-to-use fully featured programming language and a high-volume high-velocity streaming analytics system. It offers operational simplicity, scalability, fault tolerance, and concurrency.||The EDB Postgres Platform is an enterprise-class data management platform based on the open source database PostgreSQL with flexible deployment options and Oracle compatibility features, complemented by tool kits for management, integration, and migration.|
|Primary database model||Relational DBMS||Time Series DBMS||Relational DBMS|
|Secondary database models||Relational DBMS||Document store|
|Developer||Apache Software Foundation||DolphinDB, Inc||EnterpriseDB|
|Current release||10.16.1.1, May 2022||v2.00.4, January 2022||14, December 2021|
|License Commercial or Open Source||Open Source Apache version 2||commercial free community version available||commercial BSD for PostgreSQL-components|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Server operating systems||All OS with a Java VM||Linux|
|Typing predefined data types such as float or date||yes||yes||yes|
|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||no||yes specific XML-type available, but no XML query functionality.|
|SQL Support of SQL||yes||SQL-like query language||yes standard with numerous extensions|
|APIs and other access methods||JDBC||JDBC|
JSON over HTTP
MQTT (Message Queue Telemetry Transport)
native C library
streaming API for large objects
|Supported programming languages||Java||C#|
|Server-side scripts Stored procedures||Java Stored Procedures||yes||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.|
|Partitioning methods Methods for storing different data on different nodes||none||horizontal partitioning||horizontal partitioning by hash, list or range|
|Replication methods Methods for redundantly storing data on multiple nodes||Source-replica replication||yes||Multi-source replication|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||yes||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||yes||no||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||yes||ACID|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes, multi-version concurrency control (MVCC)|
|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||no|
|User concepts Access control||fine grained access rights according to SQL-standard||Administrators, Users, Groups||fine grained access rights according to SQL-standard|
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|Derby often called Apache Derby, originally IBM Cloudscape; contained in the Java SDK as JavaDB||DolphinDB||EDB Postgres|
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