combine and merge rows in SAS - sas

Question

I have a SAS Table like:
DATA test;
INPUT id sex $ age inc r1 r2 Zaehler work $;
DATALINES;
1 F 35 17 7 2 1 w
17 M 40 14 5 5 1 w
33 F 35 6 7 2 1 w
49 M 24 14 7 5 1 w
65 F 52 9 4 7 1 w
81 M 44 11 7 7 1 w
2 F 35 17 6 5 1 n
18 M 40 14 7 5 1 n
34 F 47 6 6 5 1 n
50 M 35 17 5 7 1 w
;
PROC PRINT; RUN;
proc sort data=have;
by county;
run;
I want compare rows if sex and age is equal and build sum over Zaehler. For example:
1 F 35 17 7 2 1 w
and
33 F 35 6 7 2 1 w
sex=f and age=35 are equale so i want to merge them like:
id sex age inc r1 r2 Zaehler work
1 F 35 17 7 2 2 w
I thought i can do it with proc sql but i can't use sum in proc sql. Can someone help me out?

Answer 1

PROC SUMMARY is the normal way to compute statistics.
proc summary data=test nway ;
class sex age ;
var Zaehler;
output out=want sum= ;
run;
Why would you want to include variables other than SEX, AGE and Zaehler in the output?

Answer 2

Your requirement is not difficult to understand or to satisfy, however, I am not sure what is your underline reason for doing this. Explain more on your purpose may help to facilitate better answers that work from the root of your project. Although I have a feeling the PROC MEAN may give you better matrix, here is a one step PROC SQL solution to get you the summary as well as retaining "the value of first row":
proc sql;
create table want as
select id, sex , age, inc, r1, r2, sum(Zaehler) as Zaehler, work
from test
group by sex, age
having id = min(id) /*This is tell SAS only to keep the row with the smallest id within the same sex,age group*/
;
quit;

Answer 3

You can use proc sql to sum over sex and age
proc sql;
create table sum as
select
sex
,age
,sum(Zaehler) as Zaehler_sum
from test
group by
sex
,age;
quit;
You can than join it back to the main table if you want to include all the variables
proc sql;
create table test_With_Sum as
select
t.*
,s.Zaehler_sum
from test t
inner join sum s on t.sex = s.sex
and t.age = s.age
order by
t.sex
,t.age
;
quit;
You can write it all as one proc sql query if you wish and the order by is not needed, only added for a better visibility of summarised results

Answer 4

Not a good solution. But it should give you some ideas.
DATA test;
INPUT id sex $ age inc r1 r2 Zaehler work $;
DATALINES;
1 F 35 17 7 2 1 w
17 M 40 14 5 5 1 w
33 F 35 6 7 2 1 w
49 M 24 14 7 5 1 w
65 F 52 9 4 7 1 w
81 M 44 11 7 7 1 w
2 F 35 17 6 5 1 n
18 M 40 14 7 5 1 n
34 F 47 6 6 5 1 n
50 M 35 17 5 7 1 w
;
run;
data t2;
set test;
nobs = _n_;
run;
proc sort data=t2;by descending sex descending age descending nobs;run;
data t3;
set t2;
by descending sex descending age;
if first.age then count = 0;
count + 1;
zaehler = count;
if last.age then output;
run;
proc sort data=t3 out=want(drop=nobs count);by nobs sex age;run;

Answer 5

thanks for your help. Here is my final code.
proc sql;
create table sum as
select distinct
sex
,age
,sum(Zaehler) as Zaehler
from test
WHERE work = 'w'
group by
sex
,age
;
PROC PRINT;quit;
I just modify the code a little bit. I filtered the w and i merg the Columns with the same value.
It was just an example the real Data is much bigger and has more Columns and rows.