Difference between ISBLANK and ISNULL September 28, 2012January 7, 2024InfallibleTechie Admin ISBLANKISNULLDetermines if an expression has a value and returnsTRUE if it does not. If it contains a value, this function returns FALSE.Determines if an expression isnull (blank) and returns TRUE if it is. If it contains a value, this functionreturns FALSE.Text fields cannot be null. So use mainly for text fields.Numeric fields cannot be blank. So use mainly for numeric fields.