DBMS > Oracle Rdb vs. PostgreSQL vs. YugabyteDB
System Properties Comparison Oracle Rdb vs. PostgreSQL vs. YugabyteDB
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|Editorial information provided by DB-Engines|
|Name||Oracle Rdb Xexclude from comparison||PostgreSQL Xexclude from comparison||YugabyteDB Xexclude from comparison|
|Description||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL||High-performance distributed SQL database for global, internet-scale applications. Wire compatible with PostgreSQL.|
|Primary database model||Relational DBMS||Relational DBMS with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.||Relational DBMS|
|Secondary database models||Document store||Document store|
Wide column store
|Developer||Oracle, originally developed by Digital Equipment Corporation (DEC)||PostgreSQL Global Development Group www.postgresql.org/developer||YugaByte Inc.|
|Initial release||1984||1989 1989: Postgres, 1996: PostgreSQL||2017|
|Current release||12.2, February 2020||2.0.10, January 2020|
|License Commercial or Open Source||commercial||Open Source BSD||Open Source Apache 2.0|
|Cloud-based only Only available as a cloud service||no||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Implementation language||C||C and C++|
|Server operating systems||HP Open VMS||FreeBSD|
|Data scheme||Flexible Schema (defined schema, partial schema, schema free)||yes||depending on used data model|
|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.||no||yes specific XML-type available, but no XML query functionality.||no|
|SQL Support of SQL||yes||yes standard with numerous extensions||yes, PostgreSQL compatible|
|APIs and other access methods||ADO.NET|
native C library
streaming API for large objects
|YCQL, an SQL-based flexible-schema API with its roots in Cassandra Query Language|
|Supported programming languages||.Net|
|Server-side scripts Stored procedures||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.||yes sql, plpgsql, C|
|Partitioning methods Methods for storing different data on different nodes||partitioning by range, list and (since PostgreSQL 11) by hash||Sharding|
|Replication methods Methods for redundantly storing data on multiple nodes||Master-slave replication other methods possible by using 3rd party extensions||Based on Raft distributed consensus protocol, minimum 3 replicas for continuous availability|
|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||Strong consistency on writes and tunable consistency on reads|
|Foreign keys Referential integrity||yes||yes||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||yes, on a single node||ACID||Distributed ACID with Serializable & Snapshot Isolation. Inspired by Google Spanner architecture.|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes||yes||yes based on RocksDB|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no||no||no|
|User concepts Access control||fine grained access rights according to SQL-standard||yes|
More information provided by the system vendor
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