Keeping First/Last record from multiple records in Prepare data/Explore & Visualize steps

[Hitesh]

Hi Experts,

I have dataset loaded to CAS (Job runs every morning) which has structure (Sample data given below). I want to calculate days to first Activity for each ID and then aggregate these days (Average days) for each manager (Not in the sample data). To do that I need to create  a new variable(Column) which keeps only First Activity_Date (First date) without creating new or aggregating dataset as I am aggregating later. Please advise or provide steps for Prepare-data level or Explore & Visualize level, either is fine.

Sample data:

ID	Created_Date	Activity_Date
A001	29-Jun-20	5-Jul-20
A001	29-Jun-20	8-Aug-20
A001	29-Jun-20	1-Jul-20
A001	29-Jun-20	15-Jan-21
A005	1-Jan-21
AD11	5-Aug-19	9-Feb-20
AD11	5-Aug-19	10-Feb-20
AD11	5-Aug-19	11-Feb-20
AD11	5-Aug-19	12-Feb-20
AD11	5-Aug-19	9-Jan-21
AD11	5-Aug-19	6-Sep-20
AD11	5-Aug-19	29-Feb-20
AD11	5-Aug-19	15-Sep-19
AD11	5-Aug-19	15-Sep-19
AD11	5-Aug-19	9-Jan-21
BC09	1-Jan-21	10-Apr-21
BC09	1-Jan-21	5-Feb-21
FDC1	10-May-21
XY01	3-Apr-20	23-May-21

Output Desired:

ID	Created_Date	Activity_Date	FirstActivityDate	DaysToFirstActivity
A001	29-Jun-20	1-Jul-20	1-Jul-20	2
A001	29-Jun-20	5-Jul-20
A001	29-Jun-20	8-Aug-20
A001	29-Jun-20	15-Jan-21
A005	1-Jan-21
AD11	5-Aug-19	15-Sep-19	15-Sep-19	41
AD11	5-Aug-19	15-Sep-19
AD11	5-Aug-19	9-Feb-20
AD11	5-Aug-19	10-Feb-20
AD11	5-Aug-19	11-Feb-20
AD11	5-Aug-19	12-Feb-20
AD11	5-Aug-19	29-Feb-20
AD11	5-Aug-19	6-Sep-20
AD11	5-Aug-19	9-Jan-21
AD11	5-Aug-19	9-Jan-21
BC09	1-Jan-21	5-Feb-21	5-Feb-21	35
BC09	1-Jan-21	10-Apr-21
FDC1	10-May-21
XY01	3-Apr-20	23-May-21	23-May-21	415

Thank you very much in advance.

-Hitesh

[CarmineVerrell]

Only way that i think you will be able to do this is via code. I would use SAS STudio and connect to a cas session.

With datastep syntax below. There might be a different way but here is what i came up with.

cas mySession sessopts=(caslib=casuser timeout=1800 locale="en_US");

libname caspub cas caslib=public; /*libname to the CASLIB that contains data*/

proc sort data=caspub.book1 out=work.book1;
by ID Created_Date  Activity_Date;
run;

data work.book1;
    set work.book1;
    by ID Created_Date  Activity_Date;

if first.ID=1 then do; diff=Activity_Date-Created_Date; end;

run;

Hope this helps.

Carmine

[Hitesh]

Thanks for the quick reply,
I check this out before posting my question. It is a kind of solution but it aggregates to ID level and creates new dataset. I dont want to aggregate to ID level but create new variable which retains only first activity date.. My dataset (Which I'm using) is also dependent on Report-level controls.
May be wait for some other solution/work around..