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분석/데이터분석

MySQL 날짜/시간 함수

by 여우요원 2022. 3. 29.

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