DATE_FORMAT()

函数说明

根据格式字符串格式化日期值。如果任一参数为 NULL，则函数返回 NULL。

DATE_FORMAT() 返回一个字符串，其中包含由 character_set_connection 和 collat​​ion_connection 给出的字符集和排序规则，以便它可以返回包含非 ASCII 字符的月份和工作日名称。

函数语法

  1. > DATE_FORMAT(date,format)

参数释义

参数说明
date必要参数。date 参数是合法的日期表达式。
format必要参数。Required. format 可用的说明符可以参加下表详情。

Format 说明符

Info

下表中显示的说明符可用于格式字符串。在格式说明符字符之前需要加 % 字符。说明符也适用于函数 UNIX_TIMESTAMP()。

说明符描述
%aAbbreviated weekday name (Sun..Sat)
%bAbbreviated month name (Jan..Dec)
%cMonth, numeric (0..12)
%DDay of the month with English suffix (0th, 1st, 2nd, 3rd, …)
%dDay of the month, numeric (00..31)
%eDay of the month, numeric (0..31)
%fMicroseconds (000000..999999)
%HHour (00..23)
%hHour (01..12)
%IHour (01..12)
%iMinutes, numeric (00..59)
%jDay of year (001..366)
%kHour (0..23)
%lHour (1..12)
%MMonth name (January..December)
%mMonth, numeric (00..12)
%pAM or PM
%rTime, 12-hour (hh:mm:ss followed by AM or PM)
%SSeconds (00..59)
%sSeconds (00..59)
%TTime, 24-hour (hh:mm:ss)
%UWeek (00..53), where Sunday is the first day of the week; WEEK() mode 0
%uWeek (00..53), where Monday is the first day of the week; WEEK() mode 1
%VWeek (01..53), where Sunday is the first day of the week; WEEK() mode 2; used with %X
%vWeek (01..53), where Monday is the first day of the week; WEEK() mode 3; used with %x
%WWeekday name (Sunday..Saturday)
%wDay of the week (0=Sunday..6=Saturday)
%XYear for the week where Sunday is the first day of the week, numeric, four digits; used with %V
%xYear for the week, where Monday is the first day of the week, numeric, four digits; used with %v
%YYear, numeric, four digits
%yYear, numeric (two digits)
%%A literal % character
%xx, for any “x” not listed above

示例

  1. mysql> SELECT DATE_FORMAT('2009-10-04 22:23:00', '%W %M %Y');
  2. +--------------------------------------------+
  3. | date_format(2009-10-04 22:23:00, %W %M %Y) |
  4. +--------------------------------------------+
  5. | Sunday October 2009                        |
  6. +--------------------------------------------+
  7. 1 row in set (0.01 sec)
  9. mysql> SELECT DATE_FORMAT('2007-10-04 22:23:00', '%H:%i:%s');
  10. +--------------------------------------------+
  11. | date_format(2007-10-04 22:23:00, %H:%i:%s) |
  12. +--------------------------------------------+
  13. | 22:23:00                                   |
  14. +--------------------------------------------+
  15. 1 row in set (0.02 sec)
  17. mysql> SELECT Date_format('1900-10-04 22:23:00', '%D %y %a %d %m %b %j');
  18. +--------------------------------------------------------+
  19. | date_format(1900-10-04 22:23:00, %D %y %a %d %m %b %j) |
  20. +--------------------------------------------------------+
  21. | 4th 00 Thu 04 10 Oct 277                               |
  22. +--------------------------------------------------------+
  23. 1 row in set (0.01 sec)
  25. mysql> SELECT DATE_FORMAT('1997-10-04 22:23:00', '%H %k %I %r %T %S %w');
  26. +--------------------------------------------------------+
  27. | date_format(1997-10-04 22:23:00, %H %k %I %r %T %S %w) |
  28. +--------------------------------------------------------+
  29. | 22 22 10 10:23:00 PM 22:23:00 00 6                     |
  30. +--------------------------------------------------------+
  31. 1 row in set (0.01 sec)
  33. mysql> SELECT DATE_FORMAT('1999-01-01', '%X %V');
  34. +--------------------------------+
  35. | date_format(1999-01-01, %X %V) |
  36. +--------------------------------+
  37. | 1998 52                        |
  38. +--------------------------------+
  39. 1 row in set (0.00 sec)
  1. CREATE TABLE t2 (f1 DATETIME);
  2. INSERT INTO t2 (f1) VALUES ('2005-01-01');
  3. INSERT INTO t2 (f1) VALUES ('2005-02-01');
  5. mysql> SELECT Date_format(f1, "%m") AS d1,
  6.          Date_format(f1, "%m") AS d2
  7.   FROM   t2
  8.   ORDER  BY Date_format(f1, "%m");
  9.   +------+------+
  10.   | d1   | d2   |
  11.   +------+------+
  12.   | 01   | 01   |
  13.   | 02   | 02   |
  14.   +------+------+
  15.   2 rows in set (0.00 sec)
  1. CREATE TABLE t5 (a int, b date);
  2. INSERT INTO t5
  3.   VALUES    (1,
  4.              '2000-02-05'),
  5.             (2,
  6.              '2000-10-08'),
  7.             (3,
  8.              '2005-01-03'),
  9.             (4,
  10.              '2007-09-01'),
  11.             (5,
  12.              '2022-01-01');
  14. mysql> SELECT * FROM   t5
  15.   WHERE  b = Date_format('20000205', '%Y-%m-%d');
  16. +------+------------+
  17. | a    | b          |
  18. +------+------------+
  19. |    1 | 2000-02-05 |
  20. +------+------------+
  21. 1 row in set (0.01 sec)
  23. mysql> SELECT * FROM t5
  24.   WHERE  b != Date_format('20000205', '%Y-%m-%d');
  25. +------+------------+
  26. | a    | b          |
  27. +------+------------+
  28. |    2 | 2000-10-08 |
  29. |    3 | 2005-01-03 |
  30. |    4 | 2007-09-01 |
  31. |    5 | 2022-01-01 |
  32. +------+------------+
  33. 4 rows in set (0.01 sec)
  35. mysql> SELECT DATE_FORMAT("2009-01-01",'%W %d %M %Y') as valid_date;
  36. +--------------------------+
  37. | valid_date               |
  38. +--------------------------+
  39. | Thursday 01 January 2009 |
  40. +--------------------------+
  41. 1 row in set (0.00 sec)

限制

目前 date 格式只支持 yyyy-mm-dd 和 yyyymmdd 的数据格式。