MS SQL SERVER 13 - What is the output for SELECT 5+Null?

In SQL, the expression SELECT 5 + NULL involves performing arithmetic with a NULL value. Let's delve into the behavior of SQL when working with NULL in arithmetic operations.

Concept of NULL in SQL

NULL in SQL represents the absence of a value, and any operation involving NULL is considered as unknown or undefined. When you add or perform any arithmetic operation with NULL, then the result is NULL.

SQL Query and Result

SELECT 5 + NULL;

The result of this query is NULL. This is because adding the numeric value 5 to NULL results in an unknown value, and SQL represents this unknown value as NULL.

Finally!

In summary, when working with NULL in SQL arithmetic operations, the result is NULL. Understanding this behavior is crucial for handling data effectively and ensuring the accuracy of your queries.