Can MySQL properly sort DATETIME columns when the values have been formatted with DATE_FORMAT?

Pretty much self-explanatory. Can MySQL sort dates (i.e. not alphabetically but like a date) when the dates have been formatted with DATE_FORMAT?

Specifically, in my case, only the DATE part has been extracted from the DAT开发者_JAVA百科ETIME values.

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Yes.

ORDER BY DATE(`date_time`) DESC

If you have already calculated this when selecting columns, just use its alias.

SELECT DATE(`date_time`) AS `date`
    FROM `table`
ORDER BY `date` DESC