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DBMS > PostgreSQL

PostgreSQL System Properties

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Editorial information provided by DB-Engines
DescriptionBased on the object relational DBMS Postgres Developed as objectoriented DBMS, gradually enhanced with 'standards' like SQL
Database modelRelational DBMS with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.
DB-Engines Ranking measures the popularity of database management systems
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Rank#4  Overall
#4  Relational DBMS
Technical documentationwww.postgresql.org/­docs/­manuals
DeveloperPostgreSQL Global Development Group www.postgresql.org/­developer
Initial release1989 1989: Postgres, 1996: PostgreSQL
Current release9.6.3, May 2017
License Commercial or Open SourceOpen Source BSD
Cloud-based Only available as a cloud serviceno
Implementation languageC
Server operating systemsFreeBSD
Data schemeyes
Typing predefined data types such as float or dateyes
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 specific XML-type available, but no XML query functionality.
Secondary indexesyes
SQL Support of (almost entire) SQL standard (DML, DDL and DCL statements)yes standard with numerous extensions
APIs and other access methodsnative C library
streaming API for large objects
Supported programming languages.Net
Server-side scripts Stored proceduresuser 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 nodesno, but can be realized using table inheritance for each partition a subtable, inserts are controlled with triggers
Replication methods Methods for redundantly storing data on multiple nodesMaster-slave replication other methods possible by using 3rd party extensions
MapReduce Offers an API for user-defined Map/Reduce methodsno
Consistency concepts Methods to ensure consistency in a distributed systemImmediate Consistency
Foreign keys Referential integrityyes
Transaction concepts Support to ensure data integrity after non-atomic manipulations of dataACID
Concurrency Support for concurrent manipulation of datayes
Durability Support for making data persistentyes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.no
User concepts Access controlfine grained access rights according to SQL-standard

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More resources
DB-Engines blog posts

Microsoft SQL Server is the DBMS of the Year
4 January 2017, Matthias Gelbmann, Paul Andlinger

PostgreSQL moves up one rank at the expense of MongoDB
1 September 2016, Paul Andlinger

MySQL, PostgreSQL and Redis are the winners of the March ranking
2 March 2016, Paul Andlinger

show all

Recent citations in the news

Microsoft launches Azure Database for MySQL and PostgreSQL
10 May 2017, TechCrunch

GSA Adds Crunchy Data's PostgreSQL Enterprise Support, Professional Services to Schedule 70
4 May 2017, ExecutiveBiz (blog)

Mobilizing PostgreSQL Databases for Realtime Applications
8 May 2017, insideBIGDATA

Crunchy Data Awarded GSA IT Schedule 70 Contract For Certified Open Source PostgreSQL And PostgreSQL Support
3 May 2017, Benzinga

IBM's new platform readies open source databases for private cloud
24 May 2017, TechRepublic

provided by Google News

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