Mysql date time string format conversion interconversion

mysql string conversion time

Function involved

date_format (date, format) function, MySQL DATE_FORMAT date formatting function ()

unix_timestamp () function

str_to_date (str, format) function

from_unixtime (unix_timestamp, format) function, MySQL timestamp formatting functions FROM_UNIXTIME

Time to String

select date_format(now(), '%Y-%m-%d');
# Result: 2017-01-05

Time to turn the timestamp

select unix_timestamp(now());
# Result: 1452001082

String transfer time

select str_to_date('2016-01-02', '%Y-%m-%d %H');
# Result: 2017-01-02 00:00:00

String turn timestamp

select unix_timestamp('2016-01-02');
# Result: 1451664000

Timestamp turn time

select from_unixtime(1451997924);
# Result: 2017-01-05 20:45:24

Timestamp to String

select from_unixtime(1451997924,'%Y-%d');
// Results: 2017-01-05 20:45:24

Schedule

MySQL date format (the format) range.

	value	meaning
second	%S、%s	Sec (00, 01, ..., 59) in the form of two digits
Minute	%I、%i	Two digital form of points (00, 01, ..., 59)
hour	%H	24-hour, two-digit hour form (00, 01, ..., 23)
	%h	12-hour, two-digit hour form (00, 01, ..., 12)
	%k	24-hour clock, the number of hours in the form of (0, 1, ..., 23)
	%l	12 hour, the number of hours in the form of (0, 1, ..., 12)
	%T	24-hour time form (HH: mm: ss)
	%r	12-hour time form (hh: mm: ss AM or PM)
	%p	Morning or afternoon AM PM
week	%W	Every day of the week name (Sunday, Monday, ..., Saturday)
	%a	Every day of the week abbreviated name (Sun, Mon, ..., Sat)
	%w	Peripheral identity in digital form (0 = Sunday, 1 = Monday, ..., 6 = Saturday)
	% U	Number indicates the number of weeks, the first day of the week is Sunday
	in%	Number indicates the number of weeks, Monday is the first day of the week
day	%d	Two digits indicate the number of months of days (01, 02, ..., 31)
	%e	Month number indicates the number of days (1, 2, ..., 31)
	%D	English suffix indicates the number of days month (1st, 2nd, 3rd ...)
	%j	Three digits indicate the number of years (001, 002, ..., 366) transit
month	%M	English name of the month (January, February, ..., December)
	%b	English abbreviations month name (Jan, Feb, ..., Dec)
	%m	Two digits indicate the month (01, 02, ..., 12)
	%c	Digits indicate the month (1, 2, ..., 12)
year	%Y	Year (2015,2016 ...) four digits
year	%Y	Year (15, 16 ...) of two digits
Text output	Text%	Direct output text

Source:
https://www.cnblogs.com/cnsdhzzl/p/9850412.html