topic Re: Latest transaction with multiple entries in SAS Programming

Latest transaction with multiple entries

JT99 — Mon, 09 Nov 2015 23:36:51 GMT

Hi guys! How do I get the latest payment of an account with multiple payments on the same date? I need the sum of payments if seperate payments are done on the same date.

Acct_num Payment Pymnt_date
1 21 1oct2015
1 10 1oct2015
1 12 29sep2015
2 15 5oct201
2 11 3oct2015

Latest payment of acct_num 1 should be 31 and 15 for acct_num 2.

Re: Latest transaction with multiple entries

slchen — Mon, 09 Nov 2015 23:55:45 GMT

proc sql;
select acct_num,sum(payment) as sum
from (select acct_num,payment,pymnt_date
from have group by acct_num
having pymnt_date=max(pymnt_date))
group by acct_num;
quit;

Re: Latest transaction with multiple entries

billfish — Tue, 10 Nov 2015 00:01:33 GMT

*** a non SQL solution ****;

data t_have;
input Acct_num Payment Pymnt_date date9.;
cards;
1 21 1oct2015
1 10 1oct2015
1 12 29sep2015
2 15 5oct2015
2 11 3oct2015
;
run;

proc print data=t_a;
format Pymnt_date date9.;
run;

proc sort data=t_have; by acct_num descending Pymnt_date; run;

data t_want(keep=acct_num last_date sum_tot);
set t_have;
retain sum_tot last_date;
by acct_num;
if first.acct_num then do; sum_tot=0; last_date=Pymnt_date; end;
if (Pymnt_date= last_date) then sum_tot+payment;
if last.acct_num then output;
run;

proc print data=t_want;
format last_date date9.;
run;

Re: Latest transaction with multiple entries

Astounding — Tue, 10 Nov 2015 00:05:58 GMT

Why do identical amounts on the same day (but with different transaction numbers) represent the same transaction? Couldn't a customer change his mind and go back and buy another of the same item (or perhaps another item with the same price)? Couldn't a refund be for part of a purchase instead of the entire purchase?

Re: Latest transaction with multiple entries

JT99 — Tue, 10 Nov 2015 00:42:07 GMT

What I meant was multiple payments to the same account on the same day. Like when you pay your elec bill twice on the same day.

Re: Latest transaction with multiple entries

Reeza — Tue, 10 Nov 2015 03:06:19 GMT

You could also do a proc means by acct_num and pymt_date. Then calculate 2 metrics, total payment and number of payments per date.