GitHub

isnull-transact-sql.md

The value of check_expression is returned if it is not NULL; otherwise, replacement_value is returned after it is implicitly converted to the type of check_expression, if the types are different.
GitHub

isnull-geometry-data-type.md

The type of a geometry instance is null. Returns 0 if the instance isn't null. This method is primarily used by the SQL Server infrastructure; it isn't recommended that you use IsNull to test whether ...
TechRepublic

Learn the differences between Is Null and IsNull() in Access

Learn the differences between Is Null and IsNull() in Access Your email has been sent How many null values exist? What is the difference between a null value and a blank entry? This article answers ...
Ars Technica

Settle an argument: SQL update with left join + isnull() vs inner join

I've been in an argument with one of our devs that took an update statement with an inner join and made it a left join (because inner was missing some records somehow in the left table - tableB in ...