Web Reference: Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more. This tutorial shows you how to use the Oracle NVL () function to substitute null with a more meaningful alternative. Apr 29, 2016 ยท Both the NVL (exp1, exp2) and NVL2 (exp1, exp2, exp3) functions check the value exp1 to see if it is null. With the NVL (exp1, exp2) function, if exp1 is not null, then the value of exp1 is returned; otherwise, the value of exp2 is returned, but case to the same data type as that of exp1.
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Last Updated: April 7, 2026
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