database:mysql:date

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--- database:mysql:date [2012/12/27 19:59]
kwon37xi [MySQL Date Functions]
+++ database:mysql:date [2016/03/02 17:21] (현재)
kwon37xi
@@ 줄 1: / 줄 1: @@
 ====== MySQL Date Functions ======
   * http://www.nazuni.pe.kr/web/dev/mysql/functions_datetime.php
+===== DATETIME 타입 =====
+  * MySQL 5.6 부터 ''DATETIME'' 타입에 대해 ''DEFAULT CURRENT_TIMESTAMP''가 가능해졌다. 그 이하는 오류가 발생한다.<code>
+`createdAt` datetime DEFAULT CURRENT_TIMESTAMP 가 있을 때,
+ERROR 1067 (42000): Invalid default value for 'createdAt'
+</code>
 ===== date =====
   * 날짜/시간 값에서 날짜값만 남기기
@@ 줄 35: / 줄 43: @@
 DAY_HOUR
 YEAR_MONTH
+</code>
+===== str_to_date/date_format =====
+  * 문자열을 DATETIME 으로 변경<code>
+STR_TO_DATE(str,format)
+</code>
+  * DATETIME을 문자열로 변경<code>
+DATE_FORMAT(date, format)
+</code>
+  * 예 : <code>
+SELECT DATE_FORMAT(now(),'%Y-%m-%d'); -- 2012-12-27
+SELECT STR_TO_DATE('2012-12-27 14:21:31','%Y-%m-%d %H:%i:%s');
+</code>
+  * Format <code>
+Specifier	Description
+%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
+%u	Week (00..53), where Monday is the first day of the week
+%V	Week (01..53), where Sunday is the first day of the week; used with %X
+%v	Week (01..53), where Monday is the first day of the week; 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
 </code>

database/mysql/date.1356605987.txt.gz · 마지막으로 수정됨: 2012/12/27 19:59 저자 kwon37xi