explode field by comma.sql

SELECT T.value FROM (
  SELECT DISTINCT TRIM(SUBSTRING_INDEX(SUBSTRING_INDEX(t.ingredients, ',', n.n), ',', -1)) value
  FROM ProductsHaveMetadata t CROSS JOIN
    (
      SELECT a.N + b.N * 10 + 1 n
      FROM
        (SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) a
        ,(SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) b
      ORDER BY n
    ) n
  WHERE n.n <= 1 + (LENGTH(t.ingredients) - LENGTH(REPLACE(t.ingredients, ',', '')))
  ORDER BY value
) AS T