Feb 16, 2019 · It can be used on a type to control Nullability, it is then called the "Null Forgiving Operator". Basically, null! applies the ! operator to the value null. This overrides the nullability …

Mar 6, 2012 · The reasoning is that a null means "unknown", so the result of any comparison to a null is also "unknown". So you'll get no hit on rows by coding where my_column = null. SQL …

In Java I am told that when doing a null check one should use == instead of .equals(). What are the reasons for this?

Sep 21, 2021 · The main difference between e != null and e is not null is the way the the compiler executes the comparison. Microsoft: "The compiler guarantees that no user-overloaded …

May 1, 2010 · Understanding the difference between “IS NULL” and “= NULL” When a variable is created in SQL with the declare statement it is created with no data and stored in the variable …

Sep 6, 2017 · Can someone please explain the differences between Null, Zero and Blank in SQL to me?

This Stack Overflow question discusses the correct way to represent null XML elements.

How can I check for null values in JavaScript? I wrote the code below but it didn't work.

96 Checking null with normal equality will also return true for undefined. if (window.variable == null) alert('variable is null or undefined');

Apr 14, 2011 · 135 NULL has no value, and so cannot be compared using the scalar value operators. In other words, no value can ever be equal to (or not equal to) NULL because NULL …