I finally finished the next SFMC #SQL guide! 

This time, about nothing creating a lot of issues - a 𝐍𝐔𝐋𝐋: mateuszdabrowski.pl/docs/sql/sfmc-sql-null-functions/  

Check out: 

➡️ What is NULL? 

➡️ Why you have to think about it when you write a query? 

➡️ How to check whether you have NULLs in your data? 

➡️ What you can do to solve NULL-based issues?  

In other words, prepare for NULL, IS NULL vs ISNULL, COALESCE and NULLIF in @* Marketing Cloud Engagement *  

More to come, so keep on querying!