[백업][가리사니] postgresql 날짜형 컨버팅
postgresql
이 문서는 가리사니 개발자 포럼에 올렸던 글의 백업 파일입니다. 오래된 문서가 많아 현재 상황과 맞지 않을 수 있습니다.
공식사이트 : http://www.postgresql.org/docs/8.1/static/functions-formatting.html
SELECT to_char(now(), 'YYYY-MM-DD HH24:MI:SS.MS');
-- 출력 : 2015-04-29 01:32:11.321 (현재시간 이 출력과 같다고 가정할 때.)
SELECT to_timestamp('2015-04-29 01:32:11.321', 'YYYY-MM-DD HH24:MI:SS.MS');
-- 출력 : 2015-04-29 01:32:11.321 이 sql 메니지 툴에 맞게 출력 (MS까지 모두 삽입됨.)
SELECT to_char(to_timestamp('2015-04-29 01:32:11.321', 'YYYY-MM-DD HH24:MI:SS.MS'), 'YYYY-MM-DD HH24:MI:SS.MS');
-- 출력 : 2015-04-29 01:32:11.321
-- 주의 to_date 사용시 진짜 date 만들어간다.
SELECT to_char(to_date('2015-04-29 01:32:11.321', 'YYYY-MM-DD HH24:MI:SS.MS'), 'YYYY-MM-DD HH24:MI:SS.MS');
-- 출력 : 2015-04-29 00:00:00.000
높은 빈도
| 포멧 | 설명 |
|---|---|
| YYYY | year (4 and more digits) |
| MM | month number (01-12) |
| DD | day of month (01-31) |
| HH24 | hour of day (00-23) |
| MI | minute (00-59) |
| SS | second (00-59) |
| MS | millisecond (000-999) |
| D | day of week (1-7; Sunday is 1) |
전체
| 포멧 | 설명 |
|---|---|
| HH | hour of day (01-12) |
| HH12 | hour of day (01-12) |
| HH24 | hour of day (00-23) |
| MI | minute (00-59) |
| SS | second (00-59) |
| MS | millisecond (000-999) |
| US | microsecond (000000-999999) |
| SSSS | seconds past midnight (0-86399) |
| AM or A.M. or PM or P.M. | meridian indicator (uppercase) |
| am or a.m. or pm or p.m. | meridian indicator (lowercase) |
| Y,YYY | year (4 and more digits) with comma |
| YYYY | year (4 and more digits) |
| YYY | last 3 digits of year |
| YY | last 2 digits of year |
| Y | last digit of year |
| IYYY | ISO year (4 and more digits) |
| IYY | last 3 digits of ISO year |
| IY | last 2 digits of ISO year |
| I | last digits of ISO year |
| BC or B.C. or AD or A.D. | era indicator (uppercase) |
| bc or b.c. or ad or a.d. | era indicator (lowercase) |
| MONTH | full uppercase month name (blank-padded to 9 chars) |
| Month | full mixed-case month name (blank-padded to 9 chars) |
| month | full lowercase month name (blank-padded to 9 chars) |
| MON | abbreviated uppercase month name (3 chars) |
| Mon | abbreviated mixed-case month name (3 chars) |
| mon | abbreviated lowercase month name (3 chars) |
| MM | month number (01-12) |
| DAY | full uppercase day name (blank-padded to 9 chars) |
| Day | full mixed-case day name (blank-padded to 9 chars) |
| day | full lowercase day name (blank-padded to 9 chars) |
| DY | abbreviated uppercase day name (3 chars) |
| Dy | abbreviated mixed-case day name (3 chars) |
| dy | abbreviated lowercase day name (3 chars) |
| DDD | day of year (001-366) |
| DD | day of month (01-31) |
| D | day of week (1-7; Sunday is 1) |
| W | week of month (1-5) (The first week starts on the first day of the month.) |
| WW | week number of year (1-53) (The first week starts on the first day of the year.) |
| IW | ISO week number of year (The first Thursday of the new year is in week 1.) |
| CC | century (2 digits) |
| J | Julian Day (days since January 1, 4712 BC) |
| Q | quarter |
| RM | month in Roman numerals (I-XII; I=January) (uppercase) |
| rm | month in Roman numerals (i-xii; i=January) (lowercase) |
| TZ | time-zone name (uppercase) |
| tz | time-zone name (lowercase) |