topic Finding number of days each month between dates in SAS Programming

Finding number of days each month between dates

Vortex — Thu, 30 Apr 2015 13:31:25 GMT

Hi I am looking for a code that does the feature by JP in this thread. The issue is that if the year of the start and end date is different it does not work.

Example, Dec 2, 2014 and ends January 3, 2015.

Thank you

Re: Finding number of days each month between dates

Steelers_In_DC — Thu, 30 Apr 2015 13:37:01 GMT

Based on your question I'm not sure what you are asking for. Is this what you want?

data have;

format date1 date2 mmddyy10.;

date1 = '02DEC2014'd;

date2 = '03JAN2015'd;

run;

data want;

set have;

date_diff = intck('day',date1,date2);

run;

Re: Finding number of days each month between dates

RW9 — Thu, 30 Apr 2015 13:39:17 GMT

As they are date variables, you don't actually need to use a function:

data want;

set have;

date_diff = date2 - date1;

run;

Re: Finding number of days each month between dates

Vortex — Thu, 30 Apr 2015 13:42:26 GMT

Sorry the link didn't show up:

https://communities.sas.com/thread/51733

I am trying to find another code that does similar to this. The issue with this it does not work for cross year boundaries i.e December 2014 and January 2015

Re: Finding number of days each month between dates

RW9 — Thu, 30 Apr 2015 13:53:00 GMT

Post some test data. I personally would expand your data for each date then sum it up, note to transpose you would need to know year and month e.g.

data have;

effective_date="01JAN2014"d;

end_date="14FEB2015"d;

output;

run;

data inter;

set have;

do day_date=effective_date to end_date;

mnth=month(day_date);

yr=year(day_date);

output;

end;

run;

proc sql;

create table WANT as

select MNTH,

YR,

COUNT(1) as CNT

from INTER

group by YR,

MNTH;

quit;

Re: Finding number of days each month between dates

Vortex — Thu, 30 Apr 2015 14:10:14 GMT

Here are some sample data:

Visit Number Checkin Date CheckoutDate

2342	12/25/2014	1/6/2015
1234	12/27/2014	1/1/2015

Should be this:

Visit Number Checkin Date CheckoutDate Dec 2014 Jan 2015

2342	12/25/2014	1/6/2015	7	6
1234	12/27/2014	1/1/2015	5	1

Re: Finding number of days each month between dates

Vortex — Thu, 30 Apr 2015 14:20:51 GMT

Hey RW9, I just tried and yes I can use it!

Thank you

Re: Finding number of days each month between dates

RW9 — Thu, 30 Apr 2015 14:26:57 GMT

Yes, my program should work on that. I wouldn't go with having dates as columns though. Its a bad idea in the longer term, I mean if you had a time period (not necessarily on one row, but over all data) of several years, you can end up with lots of columns with few data in. Better to keep it normalised as my output will do, or genericise the columns, e.g. COL1-COLx, so you can use arrays and fill up only the ones you need.