temukan maksimum set kolom untuk beberapa baris dalam kueri mysql

SELECT
  *
FROM
(
  SELECT
    ROW_NUMBER() OVER (PARTITION BY Code ORDER BY Year DESC, Month DESC) AS row_number,
    *
  FROM
    myTable
)
  AS orderedTable
WHERE
  row_number = 1

EDIT Dan sekarang untuk versi yang BEKERJA di MySQL...

SELECT
  *
FROM
  myTable
WHERE
  Year * 12 + Month = (SELECT MAX(Year * 12 + Month) FROM myTable AS lookup WHERE Code = myTable.Code)

EDIT Setelah akses ke SQL, dapat mengkonfirmasi ini lebih cepat...

WHERE
    Year  = (SELECT MAX(Year)  FROM myTable AS lookup WHERE Code = myTable.Code)
AND Month = (SELECT MAX(Month) FROM myTable AS lookup WHERE Code = myTable.Code AND Year = myTable.Year)