Difference between ISBLANK and ISNULL in Salesforce

Hi kumar,

ISBLANK has the same functionality as ISNULL, but also supports text fields.

Text fields are never null, so using ISNULL() with a text field always returns false. For example, the formula field IF(ISNULL(new__c) 1, 0) is always zero regardless of the value in the New field. For text fields, use the ISBLANK function instead.

HI

Adding some points more:

It is preferred to use the ISBLANK Salesforce function instead of ISNULL Salesforce function in new Formulas. ISBLANK() has the same functionality as ISNULL(), but also supports text fields. Salesforce will continue to support ISNULL, so you do not need to change any existing formulas.

ISNULL():

Text fields are never null, so using ISNULL() with a text field always returns false. Empty date and date/time fields always return true when referenced in ISNULL() functions.

ISBLANK():

If you use ISBLANK() with a numeric field, the function only returns TRUE if the field has no value and is not configured to treat blank fields as zeroes.

For example, the formula field IF(ISNULL(new__c) 1, 0) is always zero regardless of the value in the New field. For text fields, use the ISBLANK Salesforce function instead.

Thanks