MySQL 날짜/시간 함수

mysql

mysql 날짜/시간 함수 정리

 

-- 현재시간 날짜 구하기

select now(), current_date, current_time

 

 

-- 날짜 더하고 빼기

select now(), date_add(now(), interval 1 day)

select now(), date_add(now(), interval 4 hour)

select now(), date_sub(now(), interval 1 day)

select now(), date_sub(now(), interval 4 hour)

 

 

-- 두 시간의 차이

select timestampdiff(MONTH, now(), date_add(now(), interval 4 month))

시간주기에 아래의 단위를 사용할 수 있다.

SECOND : 초
MINUTE : 분
HOUR : 시
DAY : 일
WEEK : 주
MONTH : 월
QUARTER : 분기
YEAR : 연

 

 

 

-- date 또는 datetime 데이터 포매팅하기

select now(), date_format(now, '%Y-%m-%d')

 

 

-- 문자열을 시간으로 변경하기 

select str_to_date('20220728091133', '%Y%m%d%H%i%s')

 

mysql Format String 

%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; WEEK() mode 0
%u	Week (00..53), where Monday is the first day of the week; WEEK() mode 1
%V	Week (01..53), where Sunday is the first day of the week; WEEK() mode 2; used with %X
%v	Week (01..53), where Monday is the first day of the week; WEEK() mode 3; 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

 

참고 : https://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html