topic Create Record Per Month from Date Span in SAS Programming

Create Record Per Month from Date Span

PotTheCat — Wed, 12 Sep 2018 19:43:36 GMT

I have a list of 10k + records that contain a 10 digit item number. And an effective date and a term date for each.

Effectively taking an unbroken date span and make a record for each month effective. I have a date span table created

but have no idea as to how to change the span to per month records. Please see the input output example below. Thank you in advance.

Example:

Input

ITEM EFFDATE TRMDATE

0123456789 01JAN2018 31JUN2018

Desired Output :

ITEM EFFMTH COUNT

0123456789 012018 1

0123456789 022018 1

0123456789 032018 1

0123456789 042018 1

0123456789 052018 1

0123456789 062018 1

0123456789 072018 0

0123456789 082018 0

0123456789 092018 0

0123456789 102018 0

0123456789 112018 0

Re: Create Record Per Month from Date Span

Reeza — Wed, 12 Sep 2018 19:56:07 GMT

1. Use INTCK to determine number of intervals

2. Use INTNX to calculate new date variable.

3. Use a LOOP with OUTPUT to explicitly write out new records.

data want;
set have;

n_intervals = intck('month', effdate, trmdate);

do i=0 to n_intervals

Date = intnx(month, effDate, i, 'b');
format date yymmn6.;

OUTPUT;
end;

run;

@PotTheCat wrote:

I have a list of 10k + records that contain a 10 digit item number. And an effective date and a term date for each.

Effectively taking an unbroken date span and make a record for each month effective. I have a date span table created

but have no idea as to how to change the span to per month records. Please see the input output example below. Thank you in advance.

Example:

Input

ITEM EFFDATE TRMDATE

0123456789 01JAN2018 31JUN2018

Desired Output :

ITEM EFFMTH COUNT

0123456789 012018 1

0123456789 022018 1

0123456789 032018 1

0123456789 042018 1

0123456789 052018 1

0123456789 062018 1

0123456789 072018 0

0123456789 082018 0

0123456789 092018 0

0123456789 102018 0

0123456789 112018 0

Re: Create Record Per Month from Date Span

novinosrin — Wed, 12 Sep 2018 20:49:12 GMT

data want;
set have;
do while(EFFDATE<TRMDATE);
output;
EFFDATE=intnx('month',EFFDATE,1);
if EFFDATE>TRMDATE then leave;
end;
/*format EFFDATE however you want;*/
run;

Re: Create Record Per Month from Date Span

PotTheCat — Thu, 13 Sep 2018 17:53:05 GMT

Worked perfectly. Much appreciated.