DBMS > Dgraph vs. OpenQM vs. Oracle Rdb
System Properties Comparison Dgraph vs. OpenQM vs. Oracle Rdb
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|Editorial information provided by DB-Engines|
|Name||Dgraph Xexclude from comparison||OpenQM also called QM Xexclude from comparison||Oracle Rdb Xexclude from comparison|
|Description||Distributed and scalable native Graph DBMS||QpenQM is a high-performance, self-tuning, multi-value DBMS|
|Primary database model||Graph DBMS||Multivalue DBMS||Relational DBMS|
|Developer||Dgraph Labs, Inc.||Rocket Software, originally Martin Phillips||Oracle, originally developed by Digital Equipment Corporation (DEC)|
|Current release||3.4-12||126.96.36.199, 2021|
|License Commercial or Open Source||Open Source Apache 2.0||Open Source GPLv2, extended commercial license available||commercial|
|Cloud-based only Only available as a cloud service||no||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Server operating systems||Linux|
|HP Open VMS|
|Data scheme||schema-free||yes with some exceptions||Flexible Schema (defined schema, partial schema, schema free)|
|Typing predefined data types such as float or date||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.||no||yes||no|
|SQL Support of SQL||no||no||yes|
|APIs and other access methods||GraphQL query language|
gRPC (using protocol buffers) API
|Supported programming languages||C#|
|Server-side scripts Stored procedures||no||yes|
|Partitioning methods Methods for storing different data on different nodes||yes||yes|
|Replication methods Methods for redundantly storing data on multiple nodes||Synchronous replication via Raft||yes|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no||no||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||ACID||yes, on a single node|
|Concurrency Support for concurrent manipulation of data||yes||yes||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.||no|
|User concepts Access control||no Planned for future releases||Access rights can be defined down to the item level|
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|Dgraph||OpenQM also called QM||Oracle Rdb|
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