You can try doing it this way:
Then add your formula on the student_number:
if is_student == true then this
else end
Here is a sample schema:
https://mockaroo.com/e4e0d330
You can try doing it this way:
Then add your formula on the student_number:
if is_student == true then this
else end
Here is a sample schema:
https://mockaroo.com/e4e0d330