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linux date fmt,date_format(date,frm) 详解

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DATE_FORMAT(date,format)

Formats the date

value according to

the format string.

The following specifiers may be used in the

format string. The

“%”

character is required

before format specifier characters.

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

Ranges for the month and day specifiers begin with zero due to

the fact that MySQL allows the storing of incomplete dates

such as '2014-00-00'.

As of MySQL 5.1.12, the language used for day and month names

and abbreviations is controlled by the value of the

lc_time_names system variable

(Section?9.7, “MySQL Server

Locale Support”).

As of MySQL 5.1.15,

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 5.1.15, 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'

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