Bagaimana cara menghapus catatan di MySQL dan menyimpan tanggal terbaru?

Saya akan memeriksa UpdateDate terhadap sub-kueri yang terkait.

CREATE TEMPORARY TABLE
  latestRecord (
    Email        VARCHAR(128),
    updateDate   DATETIME
) 
INSERT INTO 
  latestRecord
SELECT
  Email,
  MAX(updateDate) AS updateDate
FROM
  table_1
GROUP BY
  Emal

DELETE 
  table_1
FROM
  table_1
INNER JOIN
  latestRecord
    ON  latestRecord.Email      = table_1.Email
    AND latestRecord.updateDate < table_1.updateDate

EDIT

Refactor lain dengan logika yang sama