SQL NULLs often behave unexpectedly and can silently change query results. This blog explores common null traps in filtering, aggregates, subqueries, joins, and more—with practical examples and fixes.

Introduction Have you ever wondered what are null values in data? Honestly, before diving deep, I assumed they were equal to zero, if I encountered them in numeric columns and if in text columns, simply nothing. As a result, I ended up with mismatched numbers, wrong visualizations. My worst nightmare! I got baffled, but I was sure that this must do something with these null values and I decided to learn more about them and their behavior so I can be confident that the

If you are starting your journey in test automation with Selenium, you will quickly come across a powerful testing framework called TestNG. TestNG is widely used in automation projects because it provides better test management, flexibility, and reporting compared to traditional frameworks. In this blog, you will understand what is TestNG, why it is used and the basic concepts beginners need to know to get started. What is TestNG? TestNG stands for "Test Next Generation". It