Wednesday 8 April 2015

Difference between COALESCE() & ISNULL() ?

Difference between COALESCE() & ISNULL() ?

ISNULL accepts only 2 parameters. The first parameter is checked for NULL value, if it is NULL then the second parameter is returned, otherwise it returns first parameter.


COALESCE accepts two or more parameters. One can apply 2 or as many parameters, but it returns only the first non NULL parameter.

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