How do I determine surgeon volume

[yubaraj]

I want to calculate surgeon volume before 365 days of an index operation on a subject. 

I have records for a service user, service date and surgeon ID

data WORK.docs_have(label='Surgery Data');
    input  rcpt_id:32. service_date:date9. physician_id:32.;
   format service_date date9.;
 datalines;
 1356 22NOV2008 3354 
 1123 13OCT2010 3354 
 1267 18JAN2011 3354 
 1123 15AUG2011 3354 
 1145 30NOV2009 2234 
 1323 24JAN2010 2234 
 1122 29JAN2010 2234 
 1122 13SEP2010 2234 
 ;;;;

and I want Output like this

 data WORK.docs_want(label='Surgery Data_want');
    input  rcpt_id:32. service_date:date9. physician_id:32. surg_vol:12;
   format service_date date9.;
 datalines;
 1356 22NOV2008 3354 0
 1123 13OCT2010 3354 0
 1267 18JAN2011 3354 1
 1123 15AUG2011 3354 2
 1145 30NOV2009 2234 0
 1323 24JAN2010 2234 1
 1122 29JAN2010 2234 2
  ;;;;

[jimbarbour]

Below is an example of how to do something very close to what you want.  I'm using calendar year in this example, but I believe you want a 365 day period not just calendar year.  You would need to modify my example if calendar year is not what you want, but the solution should be along the lines of what I have coded.

Jim

data WORK.docs_have(label='Surgery Data');
    input  rcpt_id:32. service_date:date9. physician_id:32.;
   format service_date date9.;
 datalines;
 1356 22NOV2008 3354 
 1123 13OCT2010 3354 
 1267 18JAN2011 3354 
 1123 15AUG2011 3354 
 1145 30NOV2009 2234 
 1323 24JAN2010 2234 
 1122 29JAN2010 2234 
 1122 13SEP2010 2234 
 ;;;;
 run;

 PROC	SQL;
 	CREATE	TABLE	WORK.Surgery_Volume	AS
 	SELECT	Physician_ID
			, YEAR(Service_Date)		AS	Year
			,COUNT(YEAR(Service_Date))	AS	Total_Vol
		FROM	WORK.Docs_Have
		GROUP	BY	Physician_ID, Year
		;
 QUIT;

 PROC	SQL;
 	CREATE	TABLE	WORK.Docs_Vol		AS
	 	SELECT	Rcpt_ID
				,Service_Date
				,Docs.Physician_ID
				,Year
				,Total_Vol
			FROM			WORK.Docs_Have		Docs
			INNER	JOIN	WORK.Surgery_Volume	Surg
				ON	Docs.Physician_ID	=	Surg.Physician_ID
				AND	YEAR(Service_Date)	=	Year
				;
 QUIT;

 PROC	SORT	DATA=WORK.Docs_Vol;
 	BY	Physician_ID	Year	Total_Vol;
 QUIT;

 DATA	WORK.Docs_Want;
 	DROP	Year	
			Total_Vol
			;
 	SET	WORK.Docs_Vol;
 	BY	Physician_ID	Year	Total_Vol;

	IF	Total_Vol						>	1	THEN
		DO;
			IF	FIRST.Total_Vol					THEN
				Surg_Vol				=	1;
			ELSE
				Surg_Vol				+	1;
		END;
	ELSE
		DO;
			Surg_Vol					=	0;
		END;
RUN;

Results: