What Do You Mean By PostgreSQL?
An object-relational Database Management and a general purpose system otherwise called as PostgreSQL is the latest open source database system. Postgres 4.2 at Berkeley Computer Science Department, University of California was the basis of the development of PostgreSQL.
For running on UNIX-like platforms the program designed was called as PostgreSQL. It has a good portability with varied platforms like Mac OS X, Windows, and Solaris.
It is a free and open source software. A free open source license called as Postgre license has its source code. PostgreSQL can be easily modified, used, and distributed into any form.
Very less efforts are required due to the stability of PostgreSQL. Applications based on PostgreSQL’s development the cost of the ownership is very less in comparison with other database management systems.
Highlights of PostgreSQL Features
There are many advanced features of PostgreSQL that has to be offered by other database management systems, like:
Sophisticated locking mechanism
Multi-version concurrency control (MVCC)
User-defined types
Asynchronous replication
Foreign key referential integrity
Rules, subquery, views
Nested transactions (savepoints)
Asynchronous replication
PostgreSQL and Their Recent Versions Support The Following Features
Native Microsoft Windows Server Version
Tablespaces
Point-in-time recovery
In each new release more new features are added
How is PostgreSQL Different?
Implementation of multi-version concurrency control of PostgreSQL is the first database management system even before Oracle. A snapshot isolation in Oracle has the MVCC feature. An object-relational database management and a general-purpose system, PostgreSQL helps you to add custom functions developed using programming languages like C/C++, Java, etc.
It is extensively designed for you to declare your datatypes, functional languages, index types, etc. Any part of the system can develop a custom plugin to develop for meeting your requirements in case you dont like any part of the system. Eg: adding a new optimizer.
In case you need support an active community is available for help. PostgreSQL community is available for you to support. All the answers are available in the community to resolve your issues. If you need any support there are companies to offer help.
PostgreSQL Usage
People who use PostgreSQL
There are some products and solutions built by some companies with the help of PostgreSQL. Apple, Fujitsu, Red hat, Juniper Network, Cisco, etc. are some of the featured companies. There are some of the sections that complete the list of organizations for using PostgreSQL just check it out with the PostgreSQL featured users.
There are some fundamental topics in PostgreSQL like
PostgreSQL Select
PostgreSQL Order By
PostgreSQL LIMIT
PostgreSQL IN
PostgreSQL INNER JOIN
PostgreSQL Cross Join
PostgreSQL Natural Join
PostgreSQL Having
PostgreSQL Union
PostgreSQL Insert
PostgreSQL Subquery
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