NVL – NVL2 Function in Oracle

NVL Function
NVL(x,y)

if(x ==null) Then y

* SQL> SELECT NVL(‘Param’,’1’) FROM DUAL;
Result
1

NVL2 Function
NVL2(x,y,z)

if x = null Then z,

else if x != null  Then  y

* SQL> SELECT NVL2(‘Mustafa’,’Kemal’,’Atatürk’) FROM DUAL;
Result
Kemal
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