DBMS > IBM Db2 warehouse vs. PostgreSQL

System Properties Comparison IBM Db2 warehouse vs. PostgreSQL

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Our visitors often compare IBM Db2 warehouse and PostgreSQL with IBM Db2, Snowflake and Netezza.

Editorial information provided by DB-Engines

Name

Description

Cloud-based data warehousing service

Widely used open source RDBMS

Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL

Primary database model

Relational DBMS

with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.

Secondary database models

Document store

DB-Engines Ranking measures the popularity of database management systems
Trend Chart

Score	1.87
Rank	#125	Overall
	#63	Relational DBMS

Score	550.96
Rank	#4	Overall
	#4	Relational DBMS

Website

www.ibm.com/products/db2-warehouse

www.postgresql.org

Technical documentation

www.postgresql.org/docs

Developer

IBM

PostgreSQL Global Development Group

www.postgresql.org/developer

Initial release

2014

1989

1989: Postgres, 1996: PostgreSQL

Current release

13.2 , February 2021

License

Commercial or Open Source

commercial

Open Source

BSD

Cloud-based only

Only available as a cloud service

yes

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Implementation language

Server operating systems

hosted

FreeBSD
HP-UX
Linux
NetBSD
OpenBSD
OS X
Solaris
Unix
Windows

Data scheme

yes

Typing

predefined data types such as float or date

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.

Import/export of XML data possible

yes

specific XML-type available, but no XML query functionality.

Secondary indexes

yes

SQL

Support of SQL

yes

standard with numerous extensions

APIs and other access methods

.NET Client API
JDBC
ODBC
OLE DB

ADO.NET
JDBC
native C library
ODBC
streaming API for large objects

Supported programming languages

Java
JavaScript (Node.js)
Perl
PHP
Python
R
Ruby

.Net
C
C++
Delphi
Java

JDBC
JavaScript (Node.js)
Perl
PHP
Python
Tcl

Server-side scripts

Stored procedures

PL/SQL, SQL PL

user defined functions

realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.

Triggers

yes

Partitioning methods

Methods for storing different data on different nodes

Sharding

partitioning by range, list and (since PostgreSQL 11) by hash

Replication methods

Methods for redundantly storing data on multiple nodes

yes

Source-replica replication

other methods possible by using 3rd party extensions

MapReduce

Offers an API for user-defined Map/Reduce methods

Consistency concepts

Methods to ensure consistency in a distributed system

Immediate Consistency

Foreign keys

Referential integrity

yes

Transaction concepts

Support to ensure data integrity after non-atomic manipulations of data

ACID

Concurrency

Support for concurrent manipulation of data

yes

Durability

Support for making data persistent

yes

In-memory capabilities

Is there an option to define some or all structures to be held in-memory only.

yes

User concepts

Access control

fine grained access rights according to SQL-standard

More information provided by the system vendor

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Related products and services

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

More resources

DB-Engines blog posts

PostgreSQL is the DBMS of the Year 2020
4 January 2021, Paul Andlinger, Matthias Gelbmann

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2 January 2019, Paul Andlinger, Matthias Gelbmann

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Recent citations in the news

8 databases supporting in-database machine learning
17 February 2021, InfoWorld

IBM Db2 - The AI Database
15 May 2020, Express Computer

IBM Positioned as a Leader In 2020 Gartner Magic Quadrant for Cloud Database Management Systems
3 December 2020, AiThority

Top Vendors of Database Management Software for 2021
9 January 2021, eWeek

IBM takes the next step with Cloud Pak for Data
23 November 2020, ZDNet

provided by Google News

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26 February 2021, The Bisouv Network

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