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<h3>NULL value</h3>
Equates to a null value.
<h4>Syntax</h4>
<pre>NULL</pre>
<h4>Arguments</h4>
None
<h4>Example</h4>
<pre> NULL &rarr; returns a null value </pre>
<h4>Note:</h4>
<p>To test for NULL use an <pre>IS NULL</pre> or <pre>IS NOT NULL</pre> expression.</p>