Welcome 微信登录

首页 / 数据库 / MySQL / Oracle to_char的时间数据格式转换

Oracle to_char的一些功能记录。1、转成年月日时分秒的操作;2、转成微妙的操作SQL> select to_char(systimestamp, "yyyy-mm-dd-hh24:mi:ss.ff") from dual;

TO_CHAR(SYSTIMESTAMP,"YYYY-MM-
------------------------------
2013-09-26-16:08:04.234000

注意,没有转成毫秒的参数格式。如果需要转成毫秒,这样操作SQL> select to_char(systimestamp, "yyyy-mm-dd-hh24:mi:ss.ff3") from dual;

TO_CHAR(SYSTIMESTAMP,"YYYY-MM-
------------------------------
2013-09-26-16:12:10.640 3、转成零点到当前时间的秒数SQL> select to_char(systimestamp, "yyyymmddhh24miss -- SSSSS") from dual;

TO_CHAR(SYSTIMESTAMP,"YYYYMMDD
------------------------------
20130926160938 -- 58178  SQL> select to_char(systimestamp, "yyyy-mm-dd-hh24:mi:ss"),2 to_char(systimestamp, "yyyymmddhh24miss -- SSSSS"),
3 to_char(systimestamp, "hh24") * 60 * 60 +
4 to_char(systimestamp, "mi") * 60 + to_char(systimestamp, "ss") +
5 to_number(to_char(systimestamp, "ff") / 1000000.00)
6 from dual
7 /

TO_CHAR(SYSTIMESTAMP,"YYYY-MM- TO_CHAR(SYSTIMESTAMP,"YYYYMMDD TO_CHAR(SYSTIMESTAMP,"HH24")*6
------------------------------ ------------------------------ ------------------------------
2013-09-26-16:00:13 20130926160013 -- 57613 57613

相关阅读:Oracle修改默认时间格式 http://www.linuxidc.com/Linux/2012-12/75816.htm修改Oracle SQL Developer的时间格式 http://www.linuxidc.com/Linux/2011-10/45484.htmOracle时间格式转换异常处理函数 http://www.linuxidc.com/Linux/2011-08/39984.htmOracle时间格式化问题 http://www.linuxidc.com/Linux/2011-02/32776.htmOracle如何修改系统默认时间格式 http://www.linuxidc.com/Linux/2010-08/27543.htm 其他参数如下表所示: 
ParameterExplanation
YEARYear, spelled out
YYYY4-digit year
YYY
YY
Y
Last 3, 2, or 1 digit(s) of year.
IYY
IY
I
Last 3, 2, or 1 digit(s) of ISO year.
IYYY4-digit year based on the ISO standard
QQuarter of year (1, 2, 3, 4; JAN-MAR = 1).
MMMonth (01-12; JAN = 01).
MONAbbreviated name of month.
MONTHName of month, padded with blanks to length of 9 characters.
RMRoman numeral month (I-XII; JAN = I).
WWWeek of year (1-53) where week 1 starts on the first day of the year and continues to the seventh day of the year.
WWeek of month (1-5) where week 1 starts on the first day of the month and ends on the seventh.
IWWeek of year (1-52 or 1-53) based on the ISO standard.
DDay of week (1-7).
DAYName of day.
DDDay of month (1-31).
DDDDay of year (1-366).
DYAbbreviated name of day.
JJulian day; the number of days since January 1, 4712 BC.
HHHour of day (1-12).
HH12Hour of day (1-12).
HH24Hour of day (0-23).
MIMinute (0-59).
SSSecond (0-59).
SSSSSSeconds past midnight (0-86399).
FFFractional seconds.
 其他语言objective-c的date格式转换,参考http://userguide.icu-project.org/formatparse/datetime 更新Oracle数据时遇到锁死情况的处理Oracle RAC 10g 升级到11g (out of place) 回退方案相关资讯      Oracle to_char  Oracle时间格式转换 
  • Oracle基础教程:函数to_char将  (11/30/2012 12:00:26)
本文评论 查看全部评论 (0)
表情: 姓名: 字数