In this comprehensive PostgreSQL article, I’ll walk you through multiple approaches to finding difference between two timestamps in PostgreSQL, from basic subtraction to more advanced techniques. PostgreSQL Difference Between Two Timestamps Before beginning, we need to be familiar with the PostgreSQL function named EXTRACT(), which retrieves or extracts a sub-field, such as a year, month, or day, from a date … Read more >>
Choosing the right database system can significantly impact your application’s performance. Today, I’m diving deep into three of the most popular relational database management systems: MySQL, MariaDB, and PostgreSQL. MariaDB Vs MySQL Vs PostgreSQL Overview of the three Databases Before we dive into the technical comparisons, let’s discuss a foundational understanding of each database system. … Read more >>
In this PostgreSQL tutorial, I will show how to create index in PostgreSQL.You will learn about the syntax of creating an index with multiple approaches. How To Create An Index In PostgreSQL While managing data in the database, indexes play a crucial role. The index enables you to locate information in the database quickly. The … Read more >>
In this PostgreSQL tutorial, I will show you PostgreSQL group_concat Examples. I will use the different functions in place of group_concat to get a string of values separated by a separator. PostgreSQL group_concat Example With the Examples, I will show you how to use the STRING_AGG() function and combine the ARRAY_TO_STRING() and ARRAY_AGG() functions to achieve a similar result … Read more >>
In this PostgreSQL tutorial, I will show you how to define auto-increment in PostgreSQL. Additionally, you will understand the data types (such as SERIAL) used to define auto-increment for the column. How To Set Auto Increment In PostgreSQL When you don’t use the primary key with every table in PostgreSQL, then it is not a … Read more >>
In this PostgreSQL tutorial, I will demonstrate how to implement the PL/pgSQL block structure in PostgreSQL. PL/pgSQL Block Structure in PostgreSQL The PL/pgSQL block structure acts as a prototype and is used when creating a function or procedure in PostgreSQL. Also, you will understand “What is an anonymous code block” and the concept of subblocks. Additionally, you … Read more >>
In this PostgreSQL tutorial, we will discuss how to insert multiple rows in PostgreSQL in a single statement. PostgreSQL INSERT Multiple Rows You can insert more than one row at a time in a single statement in PostgreSQL by specifying comma-separated multiple-row values in value list form as VALUES in the INSERT INTO statement. Syntax To insert multiple rows in PostgreSQL, follow … Read more >>
In this PostgreSQL tutorial, I will show how to use like operator in PostgreSQL. Additionally, you will learn about the wildcard percent symbol (%), which is used with the LIKE operator in a pattern to match one or multiple values. Additionally, you will learn how to use the wildcard underscore (_) while performing pattern matching. PostgreSQL Like Operator … Read more >>
In this PostgreSQL tutorial, we will study the use of PostgreSQL now() function that will allow us to create tasks with multiple real-time examples. PostgreSQL now function Before delving into the topic, let’s discuss what it is. What is the PostgreSQL NOW() Function? The NOW() function in PostgreSQL is used to get the current date and time. The … Read more >>
In this PostgreSQL tutorial, we will learn about the PostgreSQL date_trunc function, which extracts specific parts of the date and time, such as seconds, minutes, hours, days, months, and years. Postgresql date_trunc function In PostgreSQL, the date_trunc function is used to extract and truncate the specific date part (level of precision) of the date and time, such as seconds, minutes, … Read more >>
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