Group By Except For Certain Value

Question

I\'m trying to create a (sqlite) query that will perform a GROUP BY but will not group anything with the value \'unknown\'. For example, I have the table:

i         


        

Answer 1

SELECT 
  MIN(id) AS id,
  IF(tmpname=id,"unknown",tmpname) AS name,
  parent_id,
  school_id
FROM (
  SELECT 
    id,parent_id,school_id
    IF(name="unknown",id,name) AS tmpname
  FROM 
) AS baseview
GROUP BY tmpname