本文轉自：http://dev.mysql.com/doc/refman/4.1/en/date-and-time-functions.html#function_date-format

• DATE_FORMAT(date,format)

  Formats the date value according to the format string.

  The following specifiers may be used in the format string. As of MySQL 3.23, the “%” character is required before format specifier characters. In earlier versions of MySQL, “%” was optional.

  Specifier	Description
  %a	Abbreviated weekday name (Sun..Sat)
  %b	Abbreviated month name (Jan..Dec)
  %c	Month, numeric (0..12)
  %D	Day of the month with English suffix (0th, 1st, 2nd, 3rd, …)
  %d	Day of the month, numeric (00..31)
  %e	Day of the month, numeric (0..31)
  %f	Microseconds (000000..999999)
  %H	Hour (00..23)
  %h	Hour (01..12)
  %I	Hour (01..12)
  %i	Minutes, numeric (00..59)
  %j	Day of year (001..366)
  %k	Hour (0..23)
  %l	Hour (1..12)
  %M	Month name (January..December)
  %m	Month, numeric (00..12)
  %p	AM or PM
  %r	Time, 12-hour (hh:mm:ss followed by AM or PM)
  %S	Seconds (00..59)
  %s	Seconds (00..59)
  %T	Time, 24-hour (hh:mm:ss)
  %U	Week (00..53), where Sunday is the first day of the week
  %u	Week (00..53), where Monday is the first day of the week
  %V	Week (01..53), where Sunday is the first day of the week; used with %X
  %v	Week (01..53), where Monday is the first day of the week; used with %x
  %W	Weekday name (Sunday..Saturday)
  %w	Day of the week (0=Sunday..6=Saturday)
  %X	Year for the week where Sunday is the first day of the week, numeric, four digits; used with %V
  %x	Year for the week, where Monday is the first day of the week, numeric, four digits; used with %v
  %Y	Year, numeric, four digits
  %y	Year, numeric (two digits)
  %%	A literal “%” character
  %x	x, for any “x” not listed above

  The %v, %V, %x, and %X format specifiers are available as of MySQL 3.23.8. %f is available as of MySQL 4.1.1.

  Ranges for the month and day specifiers begin with zero due to the fact that MySQL permits the storing of incomplete dates such as '2014-00-00' (as of MySQL 3.23).

  As of MySQL 4.1.21, the language used for day and month names and abbreviations is controlled by the value of the lc_time_names system variable (Section 9.8, “MySQL Server Locale Support”).

  As of MySQL 4.1.23, DATE_FORMAT() returns a string with a character set and collation given by character_set_connection and collation_connection so that it can return month and weekday names containing non-ASCII characters. Before 4.1.23, the return value is a binary string.

  mysql> SELECT DATE_FORMAT('2009-10-04 22:23:00', '%W %M %Y');
      -> 'Sunday October 2009'
  mysql> SELECT DATE_FORMAT('2007-10-04 22:23:00', '%H:%i:%s');
      -> '22:23:00'
  mysql> SELECT DATE_FORMAT('1900-10-04 22:23:00',
    ->         '%D %y %a %d %m %b %j');
      -> '4th 00 Thu 04 10 Oct 277'
  mysql> SELECT DATE_FORMAT('1997-10-04 22:23:00',
    ->         '%H %k %I %r %T %S %w');
      -> '22 22 10 10:23:00 PM 22:23:00 00 6'
  mysql> SELECT DATE_FORMAT('1999-01-01', '%X %V');
      -> '1998 52'
  mysql> SELECT DATE_FORMAT('2006-06-00', '%d');
      -> '00'