Lesson 119: Create Case Insensitive VARCHAR Domain in PostgreSQL Step by Step
In this lesson, you will learn how to create a Case Insensitive VARCHAR Domain in PostgreSQL step by step. We will explain how to use DOMAIN with validation rules to store and compare text values more consistently, especially for names, emails, usernames, and codes. This beginner-friendly lesson includes practical examples to help you reduce duplicate data and improve data quality in your database.