SAS - combine rows into one record with a delimiter

SAS_combine_multiple_rows_into_one.sas

*create sample data for demonstration;
data have;
    infile cards dlm='09'x;
    input OrgID Product $   States $;
    cards;
1   football    DC
1   football    VA
1   football    MD
2   football    CA
3   football    NV
3   football    CA
;
run;

*Sort - required for both options;
proc sort data=have;
    by orgID;
run;

**********************************************************************;
*Use RETAIN and BY group processing to combine the information;
**********************************************************************;
data want_option1;
    set have;
    by orgID;
    length combined $100.;
    retain combined;

    if first.orgID then
        combined=states;
    else
        combined=catx(', ', combined, states);

    if last.orgID then
        output;
run;

**********************************************************************;
*Transpose it to a wide format and then combine into a single field;
**********************************************************************;
proc transpose data=have out=wide prefix=state_;
    by orgID;
    var states;
run;

data want_option2;
    set wide;
    length combined $100.;
    combined=catx(', ', of state_:);
run;