Date Format

 

alter session set nls_date_language='english'
;

 

alter session set nls_date_language='korean'
;

 

-- nls_date_language 의 영향을 받지 않음

select to_date('Apr 20 2010 12:35:06 PM','MON DD YYYY HH:MI:SS AM')
 from dual
 ;

 

-- nls_date_language='english' 인 경우

select to_timestamp('Apr 20 2010 12:35:06:030 PM','MON DD YYYY HH:MI:SS:FF3 AM')
 from dual
 ;

 

-- nls_date_language 값에 따라 결과가 다름

select to_char(systimestamp,'MON DD YYYY HH:MI:SS:FF AM')
 from dual
 ;

 

-- nls_date_language='korean' 인 경우

8월  13 2013 02:08:38:061000 오후

 

-- nls_date_language='english' 인 경우

AUG 13 2013 02:08:51:103000 PM

Format mask	Description
CC	Century
SCC	Century BC prefixed with -
YYYY	Year with 4 numbers
SYYY	Year BC prefixed with -
IYYY	ISO Year with 4 numbers
YY	Year with 2 numbers
RR	Year with 2 numbers with Y2k compatibility
YEAR	Year in characters
SYEAR	Year in characters, BC prefixed with -
BC	BC/AD Indicator *
Q	Quarter in numbers (1,2,3,4)
MM	Month of year 01, 02...12
MONTH	Month in characters (i.e. January)
MON	JAN, FEB
WW	Weeknumber (i.e. 1)
W	Weeknumber of the month (i.e. 5)
IW	Weeknumber of the year in ISO standard.
DDD	Day of year in numbers (i.e. 365)
DD	Day of the month in numbers (i.e. 28)
D	Day of week in numbers(i.e. 7)
DAY	Day of the week in characters (i.e. Monday)
FMDAY	Day of the week in characters (i.e. Monday)
DY	Day of the week in short character description (i.e. SUN)
J	Julian Day (number of days since January 1 4713 BC, where January 1 4713 BC is 1 in Oracle)
HH	Hournumber of the day (1-12)
HH12	Hournumber of the day (1-12)
HH24	Hournumber of the day with 24Hours notation (1-24)
AM	AM or PM
PM	AM or PM
MI	Number of minutes (i.e. 59)
SS	Number of seconds (i.e. 59)
SSSSS	Number of seconds this day.
DS	Short date format. Depends on NLS-settings. Use only with timestamp.
DL	Long date format. Depends on NLS-settings. Use only with timestamp.
E	Abbreviated era name. Valid only for calendars: Japanese Imperial, ROC Official and Thai Buddha.. (Input-only)
EE	The full era name
FF	The fractional seconds. Use with timestamp.
FF1..FF9	The fractional seconds. Use with timestamp. The digit controls the number of decimal digits used for fractional seconds.
FM	Fill Mode: suppresses blianks in output from conversion
FX	Format Exact: requires exact pattern matching between data and format model.
IYY or IY or I the last 3,2,1 digits of the ISO standard year. Output only
RM	The Roman numeral representation of the month (I .. XII)
RR	The last 2 digits of the year.
RRRR	The last 2 digits of the year when used for output. Accepts fout-digit years when used for input.
SCC	Century. BC dates are prefixed with a minus.
CC	Century
SP	Spelled format. Can appear of the end of a number element. The result is always in english. For example month 10 in format MMSP returns "ten"
SPTH	Spelled and ordinal format; 1 results in first.
TH	Converts a number to it's ordinal format. For example 1 becoms 1st.
TS	Short time format. Depends on NLS-settings. Use only with timestamp.
TZD	Abbreviated time zone name. ie PST.
TZH	Time zone hour displacement.
TZM	Time zone minute displacement.
TZR	Time zone region
X	Local radix character. In america this is a period (.)