Hello, I have a dataset that has a date variable that is in datetime16. I would like to convert it to datetime9. Not quite sure how to do this. I tried this sas code but the output jarbled the date variable to "*******"
data janfeb;
set janfeb;
format dcdeathdate date9.;
run;
Here is a sample dataset:
data JANFEB;
infile datalines dsd truncover;
input dcdeathdate:DATETIME16. nationalid:$24. HCVScreening:$9. HCVresult:$27.;
datalines4;
19JAN17:00:00:00,01001000070,No,
10JAN17:00:00:00,01001000357,Yes,Negative
20JAN17:00:00:00,01001000402,Yes,Negative
02FEB17:00:00:00,01001000799,Yes,Negative
18FEB17:00:00:00,01001000859,No,
;;;;
Thanks for your help.
SAS datetime values are seconds from 01-01-1960:00:00:00; date values are days from 01-01-1960.
To extract the date from a datetime value, use the datepart() function.
data JANFEB;
infile datalines dsd truncover;
input dcdeathdate:DATETIME16. nationalid:$24. HCVScreening:$9. HCVresult:$27.;
datalines4;
19JAN17:00:00:00,01001000070,No,
10JAN17:00:00:00,01001000357,Yes,Negative
20JAN17:00:00:00,01001000402,Yes,Negative
02FEB17:00:00:00,01001000799,Yes,Negative
18FEB17:00:00:00,01001000859,No,
;;;;
run;
data janfeb;
set janfeb;
dcdeathdate = datepart(dcdeathdate);
format dcdeathdate date9.;
run;
Or you simply assign the datetime9. format to dcdeathdate; it is then still a datetime value, but only the date is displayed.
SAS datetime values are seconds from 01-01-1960:00:00:00; date values are days from 01-01-1960.
To extract the date from a datetime value, use the datepart() function.
data JANFEB;
infile datalines dsd truncover;
input dcdeathdate:DATETIME16. nationalid:$24. HCVScreening:$9. HCVresult:$27.;
datalines4;
19JAN17:00:00:00,01001000070,No,
10JAN17:00:00:00,01001000357,Yes,Negative
20JAN17:00:00:00,01001000402,Yes,Negative
02FEB17:00:00:00,01001000799,Yes,Negative
18FEB17:00:00:00,01001000859,No,
;;;;
run;
data janfeb;
set janfeb;
dcdeathdate = datepart(dcdeathdate);
format dcdeathdate date9.;
run;
Or you simply assign the datetime9. format to dcdeathdate; it is then still a datetime value, but only the date is displayed.
Dates are stored in days and Time and DateTime are stored in seconds.
You can apply a different format (DTDATE9. for example).
You can convert using the DATEPART() function.
Or you could read it using a different informat that ignores the time part.
data JANFEB;
infile datalines dsd truncover;
length dcdeathdate dcdeathdatetime 8 nationalid $24 HCVScreening $9 HCVresult $27 ;
informat dcdeathdate date7. dcdeathdatetime datetime16.;
format dcdeathdate date9. dcdeathdatetime datetime20.;
input dcdeathdate @1 dcdeathdatetime nationalid HCVScreening HCVresult ;
datalines4;
19JAN17:00:00:00,01001000070,No,
10JAN17:00:00:00,01001000357,Yes,Negative
20JAN17:00:00:00,01001000402,Yes,Negative
02FEB17:00:00:00,01001000799,Yes,Negative
18FEB17:00:00:00,01001000859,No,
;;;;
Are you ready for the spotlight? We're accepting content ideas for SAS Innovate 2025 to be held May 6-9 in Orlando, FL. The call is open until September 25. Read more here about why you should contribute and what is in it for you!
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.