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NVL Function [message #646620]

Tue, 05 January 2016 13:09

johnsid
Messages: 3
Registered: January 2016
Location: India

Junior Member

What is the use of NVL function?

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Re: NVL Function [message #646622 is a reply to message #646620]

Tue, 05 January 2016 13:15

BlackSwan
Messages: 26766
Registered: January 2009
Location: SoCal

Senior Member

johnsid wrote on Tue, 05 January 2016 11:09

What is the use of NVL function?

unwilling or incapable to Read The Fine Manual yourself?

http://docs.oracle.com/database/121/SQLRF/functions131.htm#SQLRF00684

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Re: NVL Function [message #646649 is a reply to message #646622]

Wed, 06 January 2016 06:09

garan
Messages: 27
Registered: January 2016

Junior Member

Hi

simply NVL function is used to display alternate string value/DATE when the value obtained is null

SQL> select nvl('',sysdate) from dual;

NVL('',SYSDATE)
------------------
06-JAN-16

SQL> SELECT NVL(NULL,SYSDATE) FROM DUAL;

NVL(NULL,
---------
06-JAN-16

SQL> SELECT NVL('ABC',SYSDATE) FROM DUAL;

NVL('ABC',SYSDATE)
------------------
ABC

garani

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Re: NVL Function [message #646652 is a reply to message #646649]

Wed, 06 January 2016 07:23

javon13
Messages: 17
Registered: October 2015

Junior Member

Operations with NULL can be quite tricky. So it is sometimes useful to translate NULL to some other value and NVL function is good for that.

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