I have a parcel feature class with about 75K features, My attribute dissolve field has 500 or so parcels that I want to dissolve . The rest of the 70000 records have null in the dissolve field. What I would like is an output feature class that shows all of the records both dissolved and null. I have tried dissolving all records but this dissolves the null records too. I have tried selecting only the records to be dissolved and running the dissolve tool but that just gives me an output file with only the dissolved records. How do I only dissolve the records that are indicated and not dissolve the null records?