数学之路-sas备忘(17)

SAS日期及时间格式

data  _null_;
input mydate YYMMDD10.;
put mydate YYMMDDB10.;
put mydate YYMMDDC10.;
put mydate YYMMDDD10.;
put mydate YYMMDDN8.;
put mydate YYMMDDP10.;
put mydate YYMMDDS10.;
cards;
2014-05-18
;
run;

短日期格式 

Writes SAS date values in the form <yy>yymmdd or <yy>yy-mm-dd, where the x in the format name is a character that represents the special character that separates the year, month, and day. The special character can be a hyphen (–), period (.), blank character, slash (/), colon (:), or no separator; the year can be either 2 or 4 digits.

Syntax 




YYMMDDxw. 






Arguments 




x




identifies a separator or specifies that no separator appear between the year, the month, and the day. Here are the valid values: 




B




separates with a blank




C




separates with a colon 




D




separates with a hyphen 




N




indicates no separator




P




separates with a period 




S




separates with a slash.




w




specifies the width of the output field. 






Default


8






Range


2–10






Interactions


When w has a value of from 2 to 5, the date appears with as much of the year and the month. When w is 7, the date appears as a two-digit year without separators. 






When x has a value of N, the width range is 2–8. 






Details 




The YYMMDDxw. format writes SAS date values in the form <yy>yymmdd or <yy>yyXmmXdd. Here is an explanation of the syntax: 




<yy>yy




is a two-digit or four-digit integer that represents the year. 




X




is a specified separator.




mm




is an integer that represents the month. 




dd




is an integer that represents the day of the month. 




Comparisons 




?


The YYMMDDw.d format is similar to the YYMMDDxw.d format, but YYMMDDxw.d format contains a separator between the year and month, such as a colon, slash, or period. 






Example 




The following examples use the input value of 18922, which is the SAS date value that corresponds to October 22, 2011. 










Statements 




Results 








 


----+----1----+ 






a=put(18922,yymmddc5.); 


11:10 






a=put(18922,yymmddd8.); 


11-10-22 






a=put(18922,yymmddn8.); 


20111022 






a=put(18922,yymmddp10.); 


2011.10.22