topic Re: Sum based on date range in SAS Programming

Sum of data with sorted dates

hk2013 — Mon, 02 Oct 2017 21:43:03 GMT

I am trying to sum units based on the start_dt where concent_cnt is 1 to 5

i need a sum of units based on range of dates

Re: Sum based on date range

ballardw — Mon, 02 Oct 2017 20:33:38 GMT

Your dates look like they are character variables. If so you likely want to create new variable that are SAS date valued numeric to use "range" of dates.

What specific range of dates do you need? You don't mention it. Also you picture of the data does not include a variable named concent_cnt so saying anything about that variable isn't much help.

Re: Sum based on date range

hk2013 — Mon, 02 Oct 2017 20:40:13 GMT

its actually consec_cnt (which is counting 5 consecutive days)

i do have a range of five days but when i sum the units it sums all the units but i want sum of units for specific dates

PROC SQL ;
CREATE TABLE NEW AS
SELECT NP_RESOURCE_ID, category, START_DT, ACTDATE As End_DT, CONSEC_CNT,
INTCK('day',START_DT, ACTDATE) as DAY_DIFFERENCE
FROM cosick1
WHERE CONSEC_CNT >= 5
ORDER BY NP_RESOURCE_ID, ACTDATE ;
QUIT

Re: Sum based on date range

mkeintz — Mon, 02 Oct 2017 21:23:44 GMT

Basically you need GROUP BY, not ORDER BY:

proc sql;
  select np_resource_id,start_dt,activity_dt as end_dt,
         sum(unit) as total_units,
         max(consec_cnt) as final_consec,
	 end_dt-start_dt as difference
  from have
  group by np_resource_id,start_dt
  having consec_cnt=final_consec and final_consec >=5;
quit;

This will produce one record per np_resource_id/start_dt combination, but just those with a maximum consec_cnt>=5.

The program assumes for there are no "holes" in consec_cnt. I.e. if there is a consec_cnt=6, there must also be a 1,2,3,4, and 5.