I'm looking for a way to create a unique Identifier that will account for duplicates of a client based on an old client ID. Please see below.
I tried a do loop but it just hung up on me. Does anyone know code for this. Thanks.
Old _ClientID NewID
564 1
564 1
345 2
367 3
321 4
111 5
111 5
111 5
If you are starting with Old_ClientID and want to get NewID, you can use:
data want;
set have;
by Old_ClientID notsorted;
if first.Old_ClientID then NewID + 1;
run;
It's important that the incoming data is grouped properly. For example, all the "564" values have to appear consecutively within the incoming data.
If you are starting with Old_ClientID and want to get NewID, you can use:
data want;
set have;
by Old_ClientID notsorted;
if first.Old_ClientID then NewID + 1;
run;
It's important that the incoming data is grouped properly. For example, all the "564" values have to appear consecutively within the incoming data.
way to do this
proc sql;
create table want as
select Old_ClientID ,
(select count(distinct Old_ClientID) from
have b
where a.Old_ClientID <= b.Old_ClientID) as newid
from have a
order by newid;
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