Add variable/observation to a macro

[miss2223]

Hi I would like to add an additional calculation to replace the current date in the dataset -  'CON_DATE_START = min(PL_DATE_START, SS_DATE_START);'

The original code is below: I am aware I cannot add variables/calculation to the proc sort step. I have tried to add an extra data step above the sort step, but then the final step of %if(length) is a macro variable linking to the step from the proc sort. Which my datastep will not work considering it returns to a normal output rather than a macro output. Could you please advise how I can add a macro variable step to add the calculation in.  Many Thanks! 

proc sort
data=&lib..&customersdetail
out=_&customersdetail;
where also ANLAGE eq "&anlage";
run;

%if %length(&anlage) %then _&customersdetail;
%else &lib..&customersdetail;
(rename=(DONOTBUY=_DONOTBUY)
where=(_DONOTBUY is missing))

[andreas_lds]

---

@miss2223 wrote:

%if %length(&anlage) %then _&customersdetail;
%else &lib..&customersdetail;
(rename=(DONOTBUY=_DONOTBUY)
where=(_DONOTBUY is missing))

---

Unfortunately i don't understand what you are trying to do. I would be easier, if you post the data you have, the expected output and explain the rules that you want applied.

[miss2223]

Original data is &lib..&customersdetail
data original_data;
input var1$ CON_DATE_START PL_DATE_START SS_DATE_START;
datalines;
A 12/12/2008 11/01/2022 05/10/2007
B 19/01/2001 11/02/2008 01/03/2020
C 23/10/2008 02/08/2019 02/02/2010
D 01/09/2002 01/01/2000 19/03/2006;
run;

I want to replace the current CON_DATE_START, instead of that to use calculation CON_DATE_START = min(PL_DATE_START, SS_DATE_START)
Expecting to see:
var1 CON_DATE_START PL_DATE_START SS_DATE_START
A 05/10/2007 11/01/2022 05/10/2007
B 11/02/2008 11/02/2008 01/03/2020
C 02/02/2010 02/08/2019 02/02/2010
D 01/01/2000 01/01/2000 19/03/2006

Because the next step is in macro, I dont know how to link my replacement calculation of CON_DATE_START, so I dont need to change anything to below.

proc sort
data=&lib..&customersdetail
out=_&customersdetail;
where also ANLAGE eq "&anlage";
run;

%if %length(&anlage) %then _&customersdetail;
%else &lib..&customersdetail;
(rename=(DONOTBUY=_DONOTBUY)
where=(_DONOTBUY is missing))

[andreas_lds · Accepted solution]

The proc sort and following code non-valid sas code.

You can just insert another data step:

data want;
  set have;

  con_start_date = min(pl_date_start, ss_date_start);
run;