Most SQL Developers Get This Wrong #sql #tutorial

Most SQL learners get NULL completely wrong — and it silently breaks their queries without a single error message. In this video, you will learn exactly why NULL = NULL returns FALSE in SQL, why you should never use = NULL in your WHERE clause, and how NULL behaves differently in COUNT, JOINs, and aggregations. This is one of the most common SQL mistakes made by beginners and even experienced developers working in data analyst and data engineer roles. What you will learn: What NULL actually means in SQL Why NULL = NULL is FALSE and not TRUE The correct way to filter NULL values using IS NULL and IS NOT NULL How NULL silently affects COUNT, JOIN, and GROUP BY Real world examples of NULL causing wrong query results Who this video is for: SQL beginners who want to build a strong foundation Data analyst and data engineer job seekers preparing for interviews Anyone who has been writing WHERE salary = NULL and wondering why results are wrong 🚀 Want to master SQL for real data jobs? My next SQL training batch starts 11th May — limited seats. Comment SQL or click the link below to enroll. https://www.dataprofy.com/sqltraining/