PostgreSQL Tutorial

PostgreSQL is the open-source relational database management system that is powerful enough to run in all the major operating systems. It was developed for 15 years and had a stronghold in development and architecture. This database is good in reliability, data integrity, and accuracy. The source code is freely available and developed by a group of volunteers worldwide. It supports programming interfaces such as C, C++, Perl, Ruby, Tcl, and open database connectivity. It has SQL queries, connects, foreign keys, views, transactions, streaming replications, and standby as modern features.

Why do we need to learn PostgreSQL?

PostgreSQL is flexible and extensible, which helps data scientists to explore their training data and use it in the model and test data. Also, PostgreSQL helps to solve complex data problems within a short time, given its speed and usage of SQL commands.
Since PostgreSQL supports many languages, the commands from these languages can be used and analyzed in the database. It supplies the addition of its SQL and the commands that help its usage in different fields.
PostgreSQL is easy to learn, and it is robust and powerful. All these properties help the user to modify the commands and use PostgreSQL in their projects. The common addition, their support of PostgreSQL is vast.

Applications of PostgreSQL

Different custom functions developed from any programming language can be added to PostgreSQL, which helps maintain the database's flexibility and integrity. In addition, the user gets familiar with the database.
The database is portable so that it can be run in any operating system with the flexibility of commands used in PostgreSQL.
The database is very stable when compared with others. Hence the maintenance cost of PostgreSQL is low, and it is easy to manage by users. The ownership cost is low.
Users can freely use PostgreSQL as it is open source. Also, it can be freely modified and distributed in any form.
We can do PostgreSQL entries as it has the feature of Point-in-time recovery.

Example

How to create a table using PostgreSQL?

CREATE TABLE Employees (empID VARCHAR (32), first name VARCHAR (32), last name VARCHAR (32), designation VARCHAR (64))

How to insert data into a table?

INSERT INTO Employees (empID, first name, last name. designation) VALUES (‘1198609034’, ‘Mariya’, ‘Judith’, Tester)

Prerequisites

People with a relevant bachelor's degree and knowledge of computer programming are needed to learn PostgreSQL.
Database knowledge, especially relational databases, helps people to know and understand SQL commands and their complexity.
The administration and management of the system must be known as it helps to easily transfer the data from one platform to another.

Target Audience

People interested in PostgreSQL to add to their career development are welcome to learn the PostgreSQL tutorial. Also, people who want to know how PostgreSQL works in terms of flexibility and scalability can start doing the tutorial. The support for this database is huge; learning this will always boost the career.