What is PostgreSQL? Introduction, Advantages & Disadvantages

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What is PostgreSQL?

PostgreSQL is an enterprise-class open source database management system. It supports both SQL and JSON for relational and non-relational queries for extensibility and SQL compliance. PostgreSQL supports advanced data types and performance optimization features, which are only available in expensive commercial databases, like Oracle and SQL Server. It is also known as Postgres.

It is backed by an experienced community of developers who have made tremendous contributions to make it a highly reliable DBMS system.

In this tutorial, you will learn

A Brief History of PostgreSQL

PostgreSQL (initially called Postgres) was created by a computer science professor Michael Stonebraker and his team. Today it has become one of the popular open-source databases.

History of PostgreSQL

Let's see some important Milestone from PostgreSQL History:

  • INGRES was developed-1977
  • Michael Stonebraker and his colleagues developed Postgres- 1986
  • Support for real ACID and PL/pgSQL - 1990
  • Released as Postgres95 in -1995
  • Re-released Postgres95 as PostgreSQL 6.0 - 1996
  • MVCC, GUC, Join syntax Controls and Procedural Language Loader added- 1998-2001
  • Version 7.2 to 8.2: Included features like Schema support, Nonblocking VACUUM, Roles and dblink – 2002-2006
  • PostgreSQL 8.4 released in 2009
  • PostgreSQL 9.0 released in 2010
  • NYCPUG (New York City PostgreSQL User Group) joins PgUS (United States PostgreSQL association)- 2013
  • PGconf organised-2014

Key Features of PostgreSQL

Below are the key PostgreSQL features:

  • help developers to build applications
  • help administrators to build fault-tolerant environment by protecting data integrity.

Here, are some most prominent PostgreSQL features:

  • Compatible with various platforms using all major languages and middleware
  • It offers a most sophisticated locking mechanism
  • Support for multi-version concurrency control
  • Mature Server-Side Programming Functionality
  • Compliant with the ANSI SQL standard
  • Full support for client-server network architecture
  • Log-based and trigger-based replication SSL
  • Standby server and high availability
  • Object-oriented and ANSI-SQL2008 compatible
  • Support for JSON allows linking with other data stores like NoSQL which act as a federated hub for polyglot databases.

MySQL vs PostgreSQL

MYSQL PostgreSQL
The MySQL project has made its source code available under the terms of the GNU License, and other proprietary agreements. PostgreSQL is released under PostgreSQL License.
It's now owned by Oracle Corporation and offers several paid editions. It's free and open-source software. That means you will never need to pay anything for this service.
MySQL is ACID compliant only when using with NDB and InnoDB Cluster Storage engines PostgreSQL is completely ACID compliant.
MySQL performs well in OLAP and OLTP systems where only read speed is important. PostgreSQL performance works best in systems which demand the execution of complex queries.
MySQL is reliable and works well with BI (Business Intelligence) applications, which are difficult to read PostgreSQL works well with BI applications. However, it is more suited for Data Warehousing and data analysis applications which need fast read-write speeds.

Next, we will learn about PostgreSQL advantages and disadvantages.

Advantage of PostGRESQL

Below are the main advantages of PostgreSQL:

  • PostgreSQL can run dynamic websites and web apps as a LAMP stack option
  • PostgreSQL's write-ahead logging makes it a highly fault-tolerant database
  • PostgreSQL source code is freely available under an open source license. This allows you the freedom to use, modify, and implement it as per your business needs.
  • PostgreSQL supports geographic objects so you can use it for location-based services and geographic information systems
  • PostgreSQL supports geographic objects so it can be used as a geospatial data store for location-based services and geographic information systems
  • To learn Postgres, you don't need much training as its easy to use
  • Low maintenance and administration for both embedded and enterprise use of PostgreSQL

Disadvantage of PostGRESQL

Below are the disadvantages of PostgreSQL:

  • Postgres is not owned by one organization. So, it has had trouble getting its name out there despite being fully featured and comparable to other DBMS systems
  • Changes made for speed improvement requires more work than MySQL as PostgreSQL focuses on compatibility
  • Many open source apps support MySQL, but may not support PostgreSQL
  • On performance metrics, it is slower than MySQL.

Applications of PostgreSQL

Financial Industry

PostgreSQL is an ideal DBMS system for the financial industry. Moreover, It is fully ACID compliant which makes it an ideal choice for OLTP (Online Transaction Processing). It is also capable of performing database analytics. It can be integrated with mathematical software like Matlab and R.

Government GIS data

PostGIS

PostGIS

PostgreSQL offers powerful GIS which is called "PostGIS". This extension provides hundreds of functions to process geometric data in different formats. PostGIS is highly standard compliant. Moreover, by using both QGIS or GeoServer, the Open Source community provides the easiest method to handle Geodata.

Manufacturing

Nowadays, industrial manufacturers also using PostgreSQL to speed up their overall business process. It also helps them to optimize supply chain performance by using this open-source DBMS as storage backend. It allows companies to reduce the operation cost of their business.

Web technology and NoSQL

If your website requires to deal with hundreds or even thousands request per second at that time, scalability is a surely big issue. Here, Postgre proves the best solution.

PostgreSQL works fine with all modern web frameworks like Django, Node.js,

Hibernate, PHP, etc. It also offers replication capabilities which allow to scale out as many database servers as you want.

Scientific data

You need to generate terabytes of data if you are working on research and scientific project. Therefore, it is important to handle in the most efficient way as possible. For that, PostgreSQL offers wonderful analytical capabilities and powerful SQL engine. This helps you to manage a large amount of data with ease.

Summary

  • Introduction to PostgreSQL: PostgreSQL is an enterprise-class open source database management system
  • PostgreSQL (initially called Postgres) was created by a computer science professor Michael Stonebraker and his team
  • One of the benefits of PostgreSQL is it's compatibility with various platforms using all major languages and middleware
  • POSTGRES Server is free and open-source software which means you will never need to pay anything for this service
  • One of the PostgreSQL characteristics is it can run dynamic websites and web apps as an option to the LAMP stack.
  • Its supports JSON data.
  • Postgres is not owned by one organization. So, it has had trouble getting its name out there despite being fully featured and comparable to other DBMS systems
  • PostgreSQL is widely used in the Financial Industry, Government GIS data, Manufacturing, Web technology, and NoSQL and for Scientific Data collection works