Is the following procedure legitimate? Please note that variable month is generated by the procedure itself. I can run it without any error reported, but not sure if the results are perfectly what I want.
proc sql; create table want as select name, intnx("month", date, 0, 'e') as month format yymmdd10., mean(var) as var_ave from have group by name, month order by name, month; quit;
You need use the descriptive word "calculated", Try
proc sql; create table want as select name, intnx("month", date, 0, 'e') as month format yymmdd10., mean(var) as var_ave from have group by name, calculated month order by name, calculated month; quit;
Since variable MONTH doesn't exist anywhere else, the keyword calculated can be omitted: it is obvious which MONTH you are referring to. Both queries yield the same result.
This calculated keyword is a powerful addition to ANSI SQL made by SAS.
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