topic Re: min obs in SAS Programming

min obs

raj143 — Wed, 02 May 2018 04:50:32 GMT

i have a dataset like following

data min;

input stid marks;

101 98

102 87

103 58

100 52

;

question:: i want least stid along with his marks using sql query...........

Re: min obs

novinosrin — Wed, 02 May 2018 04:53:56 GMT

his marks? meaning whose marks? What is your expected output?

Re: min obs

JChambo — Wed, 02 May 2018 04:58:32 GMT

You want the stid and marks variables, but only for for the stid with the lowest marks value? A proc sort with the output only having 1 observation could do it. However it will only give you one result even if multiple stid have the same lowest marks value.

proc sort data=min out=lowest_marks (obs=1);by marks;run;

If you want all of the stid that have the same lowest marks value you can use an sql subquery to find the lowest marks value, and inner join on that to get all the relevant stid.

proc sql;
create table lowest_marks as
select *
from min as a
inner join (select min(marks) as lowest_marks from min) as b
	on a.marks = b.lowest_marks
;quit;

Re: min obs

novinosrin — Wed, 02 May 2018 05:11:43 GMT

data min;
input stid marks;
datalines;
101 98
102 87
103 58
100 52
;

proc sql;
create table want as
select stid,(select min(marks) from min) as marks
from min
where calculated marks=marks;
quit;

I disagree with proc sort. Rather, look at proc rank.

Re: min obs

Ksharp — Wed, 02 May 2018 13:14:46 GMT

data min;
input stid marks;
datalines;
101 98
102 87
103 58
100 52
;

proc sql;
select *
from min
having marks=min(marks);
quit;