REM SQL from the KISS (Keep It Simply SQL) Analytic video series by Developer Advocate Connor McDonald. This script looks at how to deal with nulls when using the window clause. Run this script ...

SUM(CASE WHEN Customer_ID IS NULL THEN 1 ELSE 0 END) AS Customer_ID_Null_Count, SUM(CASE WHEN Gender IS NULL THEN 1 ELSE 0 END) AS Gender_Null_Count, SUM(CASE WHEN Age IS NULL THEN 1 ELSE 0 END) AS ...

NULL in SQL is a powerful concept, representing the absence of a value. It’s used when data is unavailable or unknown, but its usage requires careful consideration. The first step is understanding the ...

A value in a field or variable that indicates nothing was ever derived and stored in it. For example, in a decimal-based amount field, a null value might be all binary 0s (null characters), but not a ...