[mysql] datetime 형식 지정하기 DATE_FORMAT()

MYSQL에서 날짜를 저장하는 datetime 형식을 사용했다

 

기본값은 이렇게 ('2021-01-28 11:22:24') 되어있다

 

값을 불러올때 날짜만 가져오는 등 형식을 지정하고 싶다면 DATE_FORMAT()을 사용하면된다!

 

---

써보면 알테지만,,,

 

🥴 가장 기본인 날짜만 뽑고싶다! 

: date_format(datetime, '%Y-%m-%d')

: 출력값('2021-01-28')

SELECT date_format(datetime, '%Y-%m-%d') FROM 'datetest' WHERE id=1;

 

🥴 중간에 '-'가 없는 '20210128'을 뽑고 싶으면 

: date_format(datetime, '%Y%m%d')

 

SELECT date_format(datetime, '%Y%m%d') FROM 'datetest' WHERE id=1;

---

SpecifierDescription (대소문자에 따라 완전히 다르게 적용되니까 주의!!!)

%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
%x	x, for any “x” not listed above

 

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