This is my table:
id | fk_company ------------------- 1 | 2 2 | 2 3 | 2 4 | 4 5 | 4 6 | 11
SELECT A, GROUP_CONCAT(B SEPARATOR '/') AS 'Category', GROUP_CONCAT(C SEPARATOR '/') AS 'ALIAS_NAME',COUNT('ALIAS_NAME') AS 'Count' FROM carnews ... ... GROUP BY 1 ORDER BY 4 DESC
This works well in my case.