topic Re: How to find out maximum value with group by condition ? in SAS Programming

How to find out maximum value with group by condition ?

MG18 — Tue, 13 Mar 2018 09:06:30 GMT

How to find out Maximum value with group by condition and below is example but it didnt worked :-

proc sql;
select id,max(sum_sell) from
(select id ,sum(sell) as sum_sell from VISITS
group by id )
group by id;
quit;

Output :-

ID max_sell
------------------
1 528
2 342
3 386

but expected output is

ID max_sell
------------------
1 528

How to achieve this using proc sql ?

Re: How to find out maximum value with group by condition ?

LinusH — Tue, 13 Mar 2018 09:15:19 GMT

Try using the having statement

HAVING max(sum_sell) = sum_sell

Re: How to find out maximum value with group by condition ?

RW9 — Tue, 13 Mar 2018 09:21:32 GMT

The reason you get three records back is because:

proc sql;
  select id,
         max(sum_sell) 
  from   (select id,sum(sell) as sum_sell from VISITS group by id)
  group by id;
quit;

You group the outside select clause by ID. That means for each distinct ID a row will appear in the output, if you have ID's 1,2,3 then thte output will have rows for 1,2,3. Do you want the max across all ID's? If so then drop the last group by. If you don't, then you have the correct result.

Re: How to find out maximum value with group by condition ?

MG18 — Tue, 13 Mar 2018 10:03:59 GMT

Still it didnt worked :<

proc sql;
select id,
max(sum_sell)
from (select id,sum(sell) as sum_sell from VISITS group by id)
group by id
HAVING max(sum_sell) =sum_sell ;
quit;

output :-

ID
------------------
1 528
2 342
3 386

Re: How to find out maximum value with group by condition ?

MG18 — Tue, 13 Mar 2018 10:11:02 GMT

DATA VISITS;
INPUT ID VISIT_DATE : MMDDYY10. sell @@;
FORMAT VISIT_DATE DATE9.;
DATALINES;
1 02/01/2003 180 1 03/02/2003 178 1 04/01/2003 170
2 03/03/2003 170 2 04/01/2003 172
3 04/01/2003 130 3 06/01/2003 128 3 08/01/2003 128
5 04/01/2003 130 5 06/01/2003 128 5 08/01/2003 128
5 04/01/2003 130 5 06/01/2003 128 5 08/01/2003 128
;

proc sql;
select * from (select id,sum(sell) as sum_sell from VISITS group by id ) where sum_sell =
(select
max(sum_sell) as sum_sell
from (select id,sum(sell) as sum_sell from VISITS group by id ) );
quit;

This is worked 🙂

Re: How to find out maximum value with group by condition ?

RW9 — Tue, 13 Mar 2018 10:18:13 GMT

And what did not work with the code I provided? All you have done is wrap my code into a where clause (i.e. adding more processing time)?