Here is what I changed it to and it still does not return anything , just sits there.
DELETE *
FROM dbo_idfy
WHERE PEOPLE_CODE_ID NOT IN(
SELECT
dbo_ACADEMIC.PEOPLE_CODE_ID
FROM dbo_ACADEMIC INNER JOIN dbo_idfy ON dbo_ACADEMIC.PEOPLE_CODE_ID =
dbo_idfy.people_code_id
WHERE...