Sum of data with sorted dates

[hk2013]

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 

[ballardw]

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.

[hk2013]

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

[mkeintz · Accepted solution]

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.