Postgresql tutorials
I’m often asked: “Should I use PostgreSQL or MongoDB for my next project?” It’s a question that doesn’t have a simple answer, but I’m here to break down everything you need to know to make an informed decision. The database landscape in 2025 has evolved significantly. PostgreSQL has added impressive JSON capabilities that blur the … Read more >>
In this tutorial, we will explore the PostgreSQL character data types, including CHAR, VARCHAR, and TEXT. Now, we will see the differences between TEXT and VARCHAR. At the end of this article, you will get clear guidance on when to use each data type for optimal database performance. PostgreSQL datatype text vs varchar Understanding PostgreSQL … Read more >>
In this Postgresql tutorial, we will learn about “Postgresql import SQL file” using different methods and platforms with multiple examples. We will create and insert some data into the PostgreSQL database using the SQL file or by importing the SQL file. PostgreSQL import SQL file Prerequisites Before you start, ensure you have: Prerequisite Description PostgreSQL … Read more >>
Whether you’re cleaning up your database, restructuring your schema, or preparing for a fresh start, the DROP TABLE command is the best solution.In this PostgreSQL tutorial, we will discuss the PostgreSQL DROP TABLE statement to remove existing table(s) from the current database. PostgreSQL DROP TABLE You can remove table(s) from the database in PostgreSQL by using the statement … Read more >>
In this PostgreSQL tutorial, we will learn about PostgreSQL Data Types. Here we will learn about the different data types available in PostgreSQL with examples. PostgreSQL Data Types PostgreSQL upholds a vast range of Data Types. It contains several data types, including Boolean, Numeric, Character, Temporal, Array, JSON, UUID, and special data types. When generating … Read more >>
In this PostgreSQL tutorial, we will learn about PostgreSQL DATE Functions Examples and know how to extract specific parts of the dates, manipulate the dates, perform arithmetic operations on dates, and convert dates or times to different time zone. PostgreSQL DATE Functions Examples Let us discuss various examples one by one in detail. Example 1: … Read more >>
Recently, I was working on a requirement that required me to execute a for loop in PostgreSQL. In this article, I will walk you through the solution to fix the error upper bound of for loop cannot be null. Upper Bound of for Loop cannot be Null I executed the below query. After executing the … Read more >>
In this comprehensive PostgreSQL tutorial, I’ll walk you through everything you need to know about PostgreSQL For loop, from basic concepts to advanced techniques that I’ve personally implemented in many applications. PostgreSQL For Loop PostgreSQL provides for loop statements to iterate over a range of integers or a result set in a sequence query. What is a … Read more >>
In this PostgreSQL tutorial, we will discuss the PostgreSQL TO_TIMESTAMP() function, which converts a string into a timestamp type value based on a specified format, with 11 real-time examples. PostgreSQL TO_TIMESTAMP PostgreSQL provides several data type formatting functions, which serve as a comprehensive set of tools to convert various data type values (such as date-time/timestamp, integer, numeric, and floating-point) into formatted strings … Read more >>
In this comprehensive article, I’ll guide you through various approaches to connecting to a PostgreSQL database and share best practices I’ve gained experience with. How to connect PostgreSQL database Case 1: In Linux In this section, we’ll learn how to connect to the PostgreSQL database in the Linux RPM package. We’ll be discussing a terminal-based … Read more >>
Download A 40 pages PDF And Learn Now.