Aggregating/Summing based on condition

[inid]

I have a large data set which i need to agregate based on the below conditions:

1 The data i have:

data have;

input Client $ transaction $ date1 MMDDYY10. date2 MMDDYY10. value1 value2;

cards;

id1 a 05/10/2010 05/10/2010 100 200

id1 a 05/10/2010 05/10/2010 200 200

id1 b 05/10/2010 05/22/2013 200 300

id1 c 05/10/2010 08/15/2016 300 100

id1 a 03/10/2017 03/10/2017 700 200

id1 b 03/10/2017 05/22/2018 200 700

;

RUN;

2. the data i want is as per below:

DATA WANT;

INPUT Client $ date1 MMDDYY10. Sum1 Sum2;

cards;

id1 05/10/2010 300 100

id1 03/10/2017 700 700

;

run;

Basically Sum1 is the sum of value 1 where date1=min(date2) and Sum2 is the sum of value2 where date1=max(date2). 

the solution can be in sas or sql. 

 Any help would be highly appreciated. 

[PaigeMiller]

proc summary data=have nway;
    class client date1;
    var value1 value2;
    output out=want sum=sum1 sum2;
run;

[ed_sas_member · Accepted solution]

Hi @inid 

Basically Sum1 is the sum of value 1 where date1=min(date2) and Sum2 is the sum of value2 where date1=max(date2). 

In your example, for client id1, min(date2) corresponds to 05/10/2010 and max(date2) to 05/22/2018. Four records have date1 = min(date2) and no record have date1=max(date2). The sum of value1 would 800 in the first case, and 0 in the second.

So it doesn't match your 'WANT' table.

Could you please explain further what is the exact rule? Wouldn't it be:

• Sum1 is the sum of value1 by Client and date1 having date2=min(date2)
• Sum2 is the sum of value2 by Client and date1 having date2=max(date2)

If so, you can try this:

proc sql;
	create table want as
	select Client, date1 format=MMDDYY10., sum(v1) as sum1, sum(v2) as sum2
	from (select *, value1*(date2=min(date2)) as v1, value2*(date2=max(date2)) as v2
	 	 from have as a
	 	 group by client, date1)
	group by client, date1;
quit;

 

Best,

[inid]

Thank you very much @ed_sas_me for your help

[smantha]

Proc sort data= have; by client_id date1 date2;
Data want;
Set have;
By client_id date1 date2;
Retain sum1 sum2;
If first.date1 then sum1= value1;
If last.date1 then do;
Sum2 = value2;
Output;
End;
Run;