https://modern-sql.com/feature/is-distinct-from
In SQL NULL = NULL isn’t true. Use IS NOT DISTINCT FROM instead of equals (=) for null-aware comparisons.
comparison operatormodernsqldistinct
https://www.w3schools.com/Sql/sql_null_values.asp
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML...
sql null values
https://www.analyticsvidhya.com/blog/2024/09/handling-null-values-in-sql/
Explore best practices and techniques for handling NULL values in SQL to enhance data integrity and accuracy in queries.
null valueshandlingsql