| nvl [message #37904] |
Tue, 05 March 2002 19:57  |
krishna
Messages: 141
Registered: October 1998
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Senior Member |
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.how does nvl work?
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| Re: nvl [message #37911 is a reply to message #37904] |
Wed, 06 March 2002 01:34  |
Manoj
Messages: 101
Registered: August 2000
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Senior Member |
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hi,
It simply Replace a null value to a provide value .
select nvl(r_no,'no roll') form try;
when it fetch data a find out null value of r_no column then it simply show y no roll.
it very usefull with numerical data ,because u cannot compair null with any char or num value.
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| Re: nvl [message #37923 is a reply to message #37904] |
Wed, 06 March 2002 10:42 |
sfhollands
Messages: 15
Registered: October 2001
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Junior Member |
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NVL function checks the value of a given variable and if the value is NULL then considers the value specified by the user
nvl(bonus,0)
if the bonus value is null then takes value of bonus to be 0
as any calculations with a null value returns null
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