(QUERY) Fix null value isn't show in csv output

Summary:

When export as xls or view online it show header with all of null value, but header is disappear in csv output

Content (required):

Hi, I wanted to fix the data as null to export data for Interface local application and the data was fix as null.

The data are show in excel , view online but header is disappear in csv output (header:USERNAME).

here is a screenshot for explain.

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):

SELECT  DISTINCT

        'active' "status",

        papf.person_number "USERID",