Delete field - value(record) from table with X++

public class Test
{
 ImportSalesPRiceParameters    ispp;
       
}

Here is get method:

[
    SRSReportDataSetAttribute(tableStr(ImportSalesPRiceParameters))
]
public ImportSalesPRiceParameters getISPP()
{
    select ispp;
    return ispp;
}

Delete method:

public void deleteFromISPP()
{
    select pda where ispp.JournalName == 'SalesCRM' && ispp.dataAreaId == '110';
    ispp.delete();
    
}

This is field in SQL:

In other languages like C# I can write 

if(ImportSalesPRiceParameters.Any())

{

//delete record or make it null value;

}

I want Journalname to assigned null value.How to make it with X++