각 언어별 날짜포맷 샘플 (date format)
java yyyy-MM-dd HH:mm:ss.SSS (e.g. ‘2021-01-31 23:59:59.123’) MySQL %Y%m%d%H%i%s (e.g. ‘20210131235959’) %Y-%m-%d %H:%i:%s (e.g. ‘2021-01-31 23:59:59’) %c/%e (e.g. ‘4/1’) (leading zero가 제거된 월일 표기) Oracle yyyymmddhh24miss (e.g. ‘20210131235959’) yyyy-mm-dd hh24:mi:ss (e.g. ‘2021-01-31 23:59:59’)