topic Re: SAS code explanation in SAS Programming

SAS code explanation

Geo- — Mon, 24 Sep 2018 02:39:34 GMT

Hi,someone know summary statement please help me with the explanation of line with number below.

I have written the annotation as I understood my way,however they are not the situation when I check it back in the excel file.

Thanks in advance!

data ccm_base_trans_3m;
	retain txn_amt_rmb_08 txn_amt_rmb_09 0;
	set ccm_base_trans(drop=event_id org where=("1jul2014"d le eff_date le "30sep2014"d));
	if "1aug2014"d le eff_date le "31aug2014"d then do;
		txn_amt_rmb_08=txn_amt_rmb;
	end;
	if "1sep2014"d le eff_date le "30sep2014"d then do;
		txn_amt_rmb_09=txn_amt_rmb;
		txn_date=datepart(eff_date);
	end;
	length mcc_desc $200.;
	mcc_desc=put(mcc,$mcc.);
run;


proc summary data=ccm_base_trans_3m(keep=becif_custid txn_amt_rmb txn_amt_rmb_08 txn_amt_rmb_09 eff_date) nway missing;
/*each becif_custid*/
	class becif_custid;
	var txn_amt_rmb txn_amt_rmb_08 txn_amt_rmb_09 eff_date;
	output out=ccm_base_trans_3m(rename=(_freq_=p3m_sum_cnt) drop=_type_)
/*1.count of txn_amt_rmb for each becif_custid*/
		sum(txn_amt_rmb) =p3m_sum_cnt
/*2.sum of txn_amt_rmb_08  for each becif_custid*/
		sum(txn_amt_rmb_08)=txn_amt_rmb_08
/*3.sum of txn_amt_rmb_09  for each becif_custid*/
		sum(txn_amt_rmb_09)=txn_amt_rmb_09
/*4.last date of eff_date for each becif_custid*/
		max(eff_date)=last_txn_date;
run;

Re: SAS code explanation

VDD — Mon, 24 Sep 2018 03:54:31 GMT

Question are you sure that you don't want the beginning of the month to be greater than or equal to rather than less than or equal to?

@Geo-has "1jul2014"d le eff_date le "30sep2014"d

would this be the soliton: "1jul2014"d => eff_date <= "30sep2014"d to change the starting of the test to be within the bounds.

the test @Geo- has only allows records that meet the condition of less than or equal to the beginning of the month in the first agreement.

Re: SAS code explanation

Shmuel — Mon, 24 Sep 2018 05:08:44 GMT

@VDD - the usage of date1 LE any_date LE last_date is equivalent to say: any_date BETWEEN date1 and last_date.

@Geo- - I understand that you got some different results using sas vs excel.

Is the difference in all four variables -

txn_amt_rmb txn_amt_rmb_08 txn_amt_rmb_09 eff_date

are dates equal ?

while txn_amt_rmb_08 contains august values, txn_amt_rmb_09 contains september values -

pay attention that in sas, according to your code, txn_amt_rmb contains values of the whole period.

You have not supplied information what have you done in excel - maybe you summed july only ?

If you want to sum each month separately you could do, either:

data ccm_base_trans_3m;
	/* retain txn_amt_rmb_08 txn_amt_rmb_09 0; <<< NO NEED */
	set ccm_base_trans(drop=event_id org where=("1jul2014"d le eff_date le "30sep2014"d));
	if "1aug2014"d le eff_date le "31aug2014"d then do;
		txn_amt_rmb_08=txn_amt_rmb;
                txn_amt_rmb = 0;   /* line added */
	end;  ELSE
	if "1sep2014"d le eff_date le "30sep2014"d then do;
		txn_amt_rmb_09=txn_amt_rmb;
                txn_amt_rmb = 0;  /* line added */
		/* txn_date=datepart(eff_date); <<< is eff_date not a date variable ? */
	end;
	length mcc_desc $200.;
	mcc_desc=put(mcc,$mcc.);
run;

or you do all in one step:

proc summary data=ccm_base_trans
       (keep=becif_custid txn_amt_rmb txn_amt_rmb_08 txn_amt_rmb_09 eff_date 
         where=("1jul2014"d le eff_date le "30sep2014"d)) nway missing;
	class becif_custid eff_date;
        format eff_date yymms7.;
	var txn_amt_rmb txn  eff_date;
	output out=ccm_base_trans_3m
                  (rename=(_freq_=p3m_sum_cnt) drop=_type_)
		sum(txn_amt_rmb) =p3m_sum_cnt
		max(eff_date)=last_txn_date;
run;

Re: SAS code explanation

Geo- — Mon, 24 Sep 2018 07:14:48 GMT

thank you for your attention.I could not change thes sas code,I am looking for what the lines with number doing.Did I interpret them right?

Re: SAS code explanation

Shmuel — Mon, 24 Sep 2018 09:45:28 GMT

1 - p3m_sum_cnt seems to be erroneous and display either the frequency (count) or the summary of txt_amt_rmb per customer ID as same variable name was given to both.

2, 3 and 4 - are interpreted correctly;

There is no summary for the 1st month in the quarter.