Hi All,
I would like to use a macro variable to determine the number of columns in a data set. I've tried looking up the syntax but can't seem to find it. Any help would be appreciated.
There is no need for a macro. The following Proc SQL code will display the number in results:
proc sql;
select nvar
from dictionary.tables
where libname='SASHELP' and memname='CLASS';
quit;
If you want the result in a data set then preface the select NVAR with : create table yourtablename as
Or in a data step:
data want;
set sashelp.vtable (where=(libname='SASHELP' and memname='CLASS'));
keep nvar;
run;
The SQL version may run faster depending on how many libraries, number of data sets and locations of the libraries.
%let dsid=%sysfunc(open(sashelp.class)); %let nvars=%sysfunc(attrn(&dsid,nvars)); %let dsid=%sysfunc(close(&dsid)); %put &nvars;
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