What is PostgreSQL Introduction Advantages Disadvantages

What is PostgreSQL? Introduction, Advantages & Disadvantages

What is PostgreSQL? 

PostgreSQL is a database management system with a long history that has been demonstrated to be solid. PostgreSQL’s powerful features make it great for enterprise-level applications, but also for web startups and mid-sized businesses. Click Here to Download.

History of PostgreSQL 

University of California, Berkeley was the first organization to use PostgreSQL. It was originally conceived and implemented by Professor Michael Stonebreaker and his graduate students, Andrew Yu and Jolly Chen. The goal was to create an enhanced version of the popular Ingres database system that could support the emerging SQL-92 standard, which was based on SQL-89, which was based on the original relational model defined by Dr. Edgar F. Codd in his seminal paper “A Relational Model of Data for Large Shared Data Banks.

We wanted to move beyond the then common system of storing data in one big file with all the records having the same structure (line-oriented or record-oriented). We wanted to store data in multiple files, so that you could store different kinds of information in different files (such as text information in one file and binary information in another) and so that you could update or delete any part of any record without rewriting the entire file. We also wanted to support transactions so that your program could run, either completely or partially, even if parts of it failed. This allows you to roll back changes if they cause problems, rather than having to write everything twice.

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What can you use PostgreSQL for?

Although primarily developed as a database server, PostgreSQL has evolved into a complete database solution that features many advanced features not usually found in commercial databases. Some of these features include:

A highly extensible object-relational database engine with support for stored procedures and triggers. A rich set of built-in data types, operators, index methods, functions, aggregates, and procedural languages. A large number of third-party extensions to add support for even more data types and storage engines. An advanced install/upgrade mechanism that allows installing or upgrading one node at a time with no interruptions.

Features of PostgreSQL

  • PostgreSQL is available for many platforms, free of charge. It supports a superset of SQL-92.
  • It has a powerful, sophisticated query language that allows for high-level data aggregation and ad hoc queries. 
  • It can handle large amounts of data with ease. It also allows the user to adjust the amount of data that is cached in RAM or on disk, depending on the amount of RAM available on the system. 
  • It supports multiple databases per server along with database replication, which can be used to implement configuration management, failover clusters, load balancing, etc. 
  • It supports custom programming hooks for users who need more control or power than provided by SQL.

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Advantages of PostgreSQL 

  • PostgreSQL is open source. The entire community can help make the product better. The PostgreSQL license allows you to use the software for free, in source or binary form, on any number of servers. 
  • You are also allowed to distribute your changes in source or binary form to anyone who wants them. 
  • The PostgreSQL license is a “copyleft” license, which means you are not only free to redistribute changes, but you should do so if you make any changes to the software itself. This is why there are so many people contributing to PostgreSQL–because they have to to get their changes back! PostgreSQL is the only major database that has an irrevocable promise that source code will always be available.

Disadvantages of PostgreSQL 

These disadvantages are small. If you need something that PostgreSQL doesn’t do, you can usually give up on PostgreSQL and use MySQL instead. If you need something that MySQL does but PostgreSQL doesn’t, you can also usually give up on PostgreSQL and use MySQL instead. This works better for some things than for others; if you want to do geospatial queries, for example, it’s not an option at all.

  • MySQL takes a few more seconds to execute a query than Postgres.
  • It doesn’t support some advanced features of MySQL.
  • It doesn’t have some features that the latest version of MySQL does.
  • It’s not always easy to install.

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Applications of PostgreSQL 

Numerous applications rely on PostgreSQL. 

Financial Industry 

The financial industry consists of many different parts, and these parts span many different parts of the world. The system has to handle a high volume of data and transactions and must be able to do so quickly. This is because the industry handles a lot of money, and speed is necessary to minimize risk.

The data stored in a database will need to be stored in a way that prevents loss or corruption, and this will require a reliable database. The database must allow for fast retrieval of information in real-time. In addition, the database will need to be able to handle all of these tasks while remaining cost-effective.

Government GIS Data 

Government agencies often publish digital data for geographic regions. They’re often not the most detailed data available, and you’d never want to try and use them to build a working replica of Google Maps, but they’re freely available and great for hobby projects.


Manufacturing is the conversion of raw materials into finished goods on a large scale. There are many subcategories, which are often grouped under the name Manufacturing. It also involves the maintenance of industrial equipment.

Manufacturers are often treated as synonymous with their employees. The term “manufacturing” may be used to describe the company or agency, to describe the process of production, or to describe the product itself.

The manufacturing sector is closely linked to and part of many other sectors that together make up the economy, such as those that produce services to manufacturing (trade), those that consume manufacturing output (the retail industry), and those that provide finance for manufacturing (banking).

Web Technology and No SQL 

The web is a technology that allows people to view and manipulate documents. We are building a brave new world of applications that operate simultaneously on multiple devices and that are accessed through interfaces that are natural to the device being used.

These new applications have requirements that are completely different from traditional enterprise applications, which has led to the rise of NoSQL databases.

However, these applications still need to be able to integrate with back-end systems of record, such as enterprise databases. PostgreSQL provides an ideal solution for this integration. Many enterprises are already using it as a backend data store for their web applications, or are planning to do so soon.

Scientific Data 

Scientific data are among the most demanding applications for database systems. They are often large. They are almost always very critical to someone’s research, so there is strong motivation to get them right. And they are highly variable in structure so that predefined schemas are of only limited use.

The PostgreSQL project has developed a sophisticated schema system that can accommodate many different types of data, while still providing the reliability expected in critical applications.

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MySQL vs. PostgreSQL 

MySQL and PostgreSQL are both open-source relational database management systems (RDBMS) with similar functionality. They are often compared, either by people making a comparison for evaluation or by partisans wishing to make a point about one system or the other. The key differences between MySQL and PostgreSQL are that MySQL is hosted by Oracle Corporation while PostgreSQL is hosted by the PostgreSQL Global Development Group, PostgreSQL is released under the PostgreSQL License while MySQL is released under the GNU General Public License (GPL), and MySQL uses Dynamic Binary Translation (DBT) while PostgreSQL uses Just-In-Time Compilation (JIT).

PostgreSQL has a larger community of developers and users than MySQL, which was started in 1995 after a split in development teams for an earlier RDBMS called bdb. Because of this, it has more features and more robustness. One technical difference is that MySQL uses Dynamic Binary Translator (DBT) technology while Postgres uses Just in Time Compiler (JIT). DBT loads code from disk at runtime, compiling it on the fly when needed. JIT compiles code when needed, so there is no need to have the code loaded in memory unless it is being used.


PostgreSQL is developed as an open-source project primarily by volunteers; it is distributed under the PostgreSQL License, which is similar in terms of restrictions to the MIT license. It was first released in 1996 and is now among the most popular database servers in use, primarily due to its high performance and rich feature set. It runs on all major operating systems and has an active developer and user community.

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