DB-EngineseXtremeDB high availability featuresEnglish
Deutsch
Knowledge Base of Relational and NoSQL Database Management Systemsprovided by solid IT

DBMS > IBM Db2 vs. Oracle vs. PostgreSQL

System Properties Comparison IBM Db2 vs. Oracle vs. PostgreSQL

Please select another system to include it in the comparison.

Editorial information provided by DB-Engines
NameIBM Db2 infoformerly named DB2 or IBM Database 2  Xexclude from comparisonOracle  Xexclude from comparisonPostgreSQL  Xexclude from comparison
DescriptionCommon in IBM host environments, 2 different versions for host and Windows/LinuxWidely used RDBMSWidely used open source RDBMS infoDeveloped as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL
Primary database modelRelational DBMS infoSince Version 10.5 support for JSON/BSON documents compatible with MongoDBRelational DBMSRelational DBMS infowith object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.
Secondary database modelsDocument store
RDF store infoin DB2 LUW (Linux, Unix, Windows)
Document store
Graph DBMS infowith Oracle Spatial and Graph
RDF store infowith Oracle Spatial and Graph
Document store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score161.62
Rank#6  Overall
#5  Relational DBMS
Score1345.00
Rank#1  Overall
#1  Relational DBMS
Score555.06
Rank#4  Overall
#4  Relational DBMS
Websitewww.ibm.com/­analytics/­db2www.oracle.com/­databasewww.postgresql.org
Technical documentationwww.ibm.com/­support/­knowledgecenter/­SSEPGGdocs.oracle.com/­en/­databasewww.postgresql.org/­docs
DeveloperIBMOraclePostgreSQL Global Development Group infowww.postgresql.org/­developer
Initial release1983 infohost version19801989 info1989: Postgres, 1996: PostgreSQL
Current release12.1, October 201619c, February 201913.1, November 2020
License infoCommercial or Open Sourcecommercial infofree version is availablecommercial inforestricted free version is availableOpen Source infoBSD
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
ScaleGrid for PostgreSQL: Fully managed PostgreSQL hosting on AWS, Azure and DigitalOcean with high availability and SSH access on the #1 multi-cloud DBaaS.
Implementation languageC and C++C and C++C
Server operating systemsAIX
HP-UX
Linux
Solaris
Windows
z/OS
AIX
HP-UX
Linux
OS X
Solaris
Windows
z/OS
FreeBSD
HP-UX
Linux
NetBSD
OpenBSD
OS X
Solaris
Unix
Windows
Data schemeyesyes infoSchemaless in JSON and XML columnsyes
Typing infopredefined data types such as float or dateyesyesyes
XML support infoSome form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.yesyes infospecific XML-type available, but no XML query functionality.
Secondary indexesyesyesyes
SQL infoSupport of SQLyesyes infowith proprietary extensionsyes infostandard with numerous extensions
APIs and other access methodsADO.NET
JDBC
JSON style queries infoMongoDB compatible
ODBC
XQuery
JDBC
ODBC
ODP.NET
Oracle Call Interface (OCI)
ADO.NET
JDBC
native C library
ODBC
streaming API for large objects
Supported programming languagesC
C#
C++
Cobol
Delphi
Fortran
Java
Perl
PHP
Python
Ruby
Visual Basic
C
C#
C++
Clojure
Cobol
Delphi
Eiffel
Erlang
Fortran
Groovy
Haskell
Java
JavaScript
Lisp
Objective C
OCaml
Perl
PHP
Python
R
Ruby
Scala
Tcl
Visual Basic
.Net
C
C++
Delphi
Java infoJDBC
JavaScript (Node.js)
Perl
PHP
Python
Tcl
Server-side scripts infoStored proceduresyesPL/SQL infoalso stored procedures in Java possibleuser defined functions inforealized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.
Triggersyesyesyes
Partitioning methods infoMethods for storing different data on different nodesSharding infoonly with Windows/Unix/Linux Versionhorizontal partitioning infowith the optional Oracle Partitioningpartitioning by range, list and (since PostgreSQL 11) by hash
Replication methods infoMethods for redundantly storing data on multiple nodesyes infowith separate tools (MQ, InfoSphere)Multi-source replication
Source-replica replication
Source-replica replication infoother methods possible by using 3rd party extensions
MapReduce infoOffers an API for user-defined Map/Reduce methodsnono infocan be realized in PL/SQLno
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integrityyesyesyes
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDACID infoisolation level can be parameterizedACID
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yes infoVersion 12c introduced the new option 'Oracle Database In-Memory'no
User concepts infoAccess controlfine grained access rights according to SQL-standardfine grained access rights according to SQL-standardfine grained access rights according to SQL-standard
More information provided by the system vendor
IBM Db2 infoformerly named DB2 or IBM Database 2OraclePostgreSQL
Specific characteristicsOracle Database (commonly referred to as Oracle RDBMS or simply as Oracle) is a multi-model...
» more
Licensing and pricing modelsOracle Database Cloud Services Customers can choose from a wide range of database...
» more

We invite representatives of system vendors to contact us for updating and extending the system information,
and for displaying vendor-provided information such as key customers, competitive advantages and market metrics.

Related products and services
3rd partiesGeneral SQL Parser: Instantly adding parsing, decoding, analysis and rewrite SQL processing capability to your products.
» more
Navicat for Oracle improves the efficiency and productivity of Oracle developers and administrators with a streamlined working environment.
» more

General SQL Parser: Instantly adding parsing, decoding, analysis and rewrite SQL processing capability to your products.
» more

DBHawk: Secure access to SQL, NoSQL and Cloud databases with an all-in-one solution.
» more
CYBERTEC: your professional partner for PostgreSQL services and Data Science based on PostgreSQL since 2000. With offices in Austria, Uruguay, Estonia and Switzerland, CYBERTEC operates worldwide!
» more

2ndQuadrant: Mission Critical Databases.
» more

General SQL Parser: Instantly adding parsing, decoding, analysis and rewrite SQL processing capability to your products.
» more

Navicat for PostgreSQL is an easy-to-use graphical tool for PostgreSQL database development.
» more

pgDash: In-Depth PostgreSQL Monitoring.
» more

We invite representatives of vendors of related products to contact us for presenting information about their offerings here.

More resources
IBM Db2 infoformerly named DB2 or IBM Database 2OraclePostgreSQL
DB-Engines blog posts

MySQL is the DBMS of the Year 2019
3 January 2020, Matthias Gelbmann, Paul Andlinger

The struggle for the hegemony in Oracle's database empire
2 May 2017, Paul Andlinger

Architecting eCommerce Platforms for Zero Downtime on Black Friday and Beyond
25 November 2016, Tony Branson (guest author)

show all

PostgreSQL is the DBMS of the Year 2018
2 January 2019, Paul Andlinger, Matthias Gelbmann

PostgreSQL is the DBMS of the Year 2017
2 January 2018, Paul Andlinger, Matthias Gelbmann

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

show all

Conferences and events

PostgreSQL Online Trainings
Online Training Courses, 4 May 2020 - 11 December 2020

Recent citations in the news

IBM to deliver refurbished Db2 for the AI and cloud era
24 November 2020, TechTarget

IBM urges infosec pros to patch DB2 for Windows, Cisco urges patches for Webex Meetings
27 November 2020, Regina Leader-Post

Trinity Guard Unveils New Tools for Linux, Db2 for i
18 November 2020, IT Jungle

Southern Farm Bureau Life Insurance, with help from migration specialist Asysco, successfully migrate their mission critical Ingenium application from IBM mainframe to a Microsoft/x86 infrastructure
23 November 2020, PRNewswire

Oracle Calls Out AWS on Exadata Cloud Service, Shares Customer Wins
13 November 2020, Cloud Wars

provided by Google News

Oracle Calls Out AWS on Exadata Cloud Service, Shares Customer Wins
13 November 2020, Cloud Wars

Oracle Flies Overall Leader Flag Over AWS Camp
5 November 2020, SDxCentral

Druva Is All Set To Deliver Data Protection For Oracle Databases To Industries
18 November 2020, Entrepreneur

Oracle secures Australian whole-of-government deal
27 November 2020, ZDNet

Oracle supercomputer AI glitch impacts elections in Brazil
19 November 2020, ZDNet

provided by Google News

Developers increasingly pair MongoDB with PostgreSQL, survey finds
3 November 2020, TechRepublic

Introducing Flexible Server in Azure Database for PostgreSQL & MySQL | Azure Friday - Microsoft
30 October 2020, Channel 9

Swarm64 DA 5.0 Brings HTAP to the Open Source PostgreSQL Database
2 November 2020, AiThority

EDB Drives Further Postgres Innovation with Release of EDB 13
17 November 2020, DevOps.com

EDB to Host Free Virtual Conference for PostgreSQL Users in Europe
29 October 2020, RealWire

provided by Google News

Job opportunities

Db2 Database Administrator
IBM, Columbia, MO

Jr. SQL Database Administrator
GOLDEN WOLF LLC, Remote

Database Administrator
State of North Carolina, North Carolina

DB2 Database Administrator
State of Wisconsin, Dane County, WI

Data Architect (DB2 and SQL)-Remote
Synergy Systems, Atlanta, GA

Oracle Database Administrator (DBA)
C3 Business Solutions, Newport Beach, CA

Parts Associate
Niagara Bottling, Florence, SC

Entry Level Database Developer
IMG-Crown Energy Services Joint Venture, LLC, Remote

Shipping & Receiving Clerk
Penske Truck Leasing and Logistics, Manteca, CA

Junior Database Administrator
Virginia ABC, Virginia

Data Technician (Full- or Part-Time)
Thasos Group, New York, NY

Software Generalist – Fullstack
Burstorm, San Carlos, CA

B1872: Customer Experience Advisor
FedEx Express, Miami, FL

Product Analyst
Game Insight, Remote

Database Adminstrator (PostgreSQL)
M3 USA, United States

jobs by Indeed




Share this page

Featured Products

Neo4j logo

Get your free copy of the new O'Reilly book Graph Algorithms with 20+ examples for
machine learning, graph analytics and more.

Datastax Astra logo

Cassandra made easy in the cloud. Build cloud-native applications faster with CQL, REST and GraphQL APIs.
Try for Free.

Couchbase logo

SQL + JSON + NoSQL.
Power, flexibility & scale.
All open source.
Get started now.

MariaDB logo

SkySQL, the ultimate
MariaDB cloud, is here.

Get started with SkySQL today!

Vertica logo

The fastest unified analytical warehouse at extreme scale with in-database Machine Learning. Try Vertica for free with no time limit.

Present your product here