本来好好的程序， 今天突然报错了。。。【FALAG_1_NOTE】————————————————————————————————————————————
proc sql;
select case when horsepower>210 then 1 else 0 end as is_big, "big flag" as flag_note, count(*) as cttot
from sashelp.cars
group by 1，2;
quit;

也报错
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        proc sql;
        create table hs300_ts_peek3a0 as
        select         var_ratio_flag2_&pctnote. as flag1, "var_ratio_flag2_&pctnote." as flag1_note, count(*) as cttot, sum(weight) as weight,
                        avg(ret_ahead) as ret_ahead_avg, std(ret_ahead) as ret_ahead_std, min(ret_ahead) as ret_ahead_min, max(ret_ahead) as ret_ahead_max,
                        avg(ret_after) as ret_after_avg, std(ret_after) as ret_after_std, min(ret_after) as ret_after_min, max(ret_after) as ret_after_max
        from &ds.
        group by 1,2;
        quit;