转换为字符串

DATE_FORMAT(post_date,'%Y-%m-%d')

比较

delete from t_agent_file where date(str_to_date(`t_agent_file`.`publish_date`,'%Y-%m-%d')) between '2015-06-01' and '2015-06-18'

DATE_FORMAT 格式

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

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'