As you know by now, there are several ways.

I would use a function. There is no DT function to directly build the datetime value, along the lines of:

composite = dt(jdate,atime);

But you can use:

composite = dhms(jdate,0,0,atime);

This is equivalent to:

composite = dhms(jdate,hour(atime),minute(atime),second(atime));

which is more explicit and abstract.

On Fri, 21 Mar 2003 09:27:07 -0500, Keith McWhorter <kmcwhort@STATE.GA.US> wrote:

>Hey, > >Be nice - I'm a SAS newbie! :-) I want to do a calculation on length of >time, but since some of my observations cross midnight, I feel I need to >have the date and time together to do the math. I've got about 5 SAS >books open on my desk trying to feel my way through this program! (This >is SAS 8.2 on OS/390 2.10) > >My input is this: > >DATA jobswait; > INFILE 'SGSS.KEITH.ALLOC'; > INPUT @44 SYSID $4. @53 JDATE JULIAN5. @59 ATIME TIME11.2 > @71 JOBNO $8. @98 JobName $8.; > IF JobName=: 'DMD'; > JNN = jobname || jobno; > >I'm then sorting on the new variable JNN. I want to take the first and >last occurances and get the difference in the time (duration). I don't >know how to combine my date and time to one variable to do the math on. > >For your enjoyment, here's the rest of the code as it is so far... > >PROC SORT data=jobswait; > BY JNN atime; > >DATA jobsone; > SET jobswait; > BY JNN; > RETAIN dur; > IF first.jnn THEN DO; > DUR = .; > start = atime; > END; > IF last.jnn THEN DO; > dur = SUM(atime - start); > jname = substr(jnn,1,8); > jno = substr(jnn,9,8); > output; > END; > >Can anyone help? >Thanks!!! > >Keith McWhorter >Georgia Technology Authority >404-656-9068