Symfony Profiler

SELECT
  SUBSTR(op.`SKU`, 1, 5) AS SKU,
  op.name,
  GROUP_CONCAT(
    DISTINCT(op.Order)
  ) as "Orders"
FROM
  `ordini_prodotti` op
  LEFT JOIN `codici_doganali` cd ON (
    SUBSTR(op.`SKU`, 1, 5) = cd.`Codice`
  )
WHERE
  Shop = 1
  AND (
    cd.Codice IS NULL
    OR cd.Codice = ""
  )
GROUP BY
  SUBSTR(op.`SKU`, 1, 5)

SELECT SUBSTR(op.`SKU`,1,5) AS SKU, op.name, GROUP_CONCAT(DISTINCT(op.Order)) as "Orders"
                                        FROM `ordini_prodotti` op
                                        LEFT JOIN `codici_doganali` cd ON (SUBSTR(op.`SKU`,1,5) = cd.`Codice`)
                                        WHERE Shop = 1 AND (cd.Codice IS NULL OR cd.Codice = "")  GROUP BY SUBSTR(op.`SKU`,1,5);