· you could try this:
data test_1 test_2; /***divide into two small data set**/
·
if _n_=1 then do until(_n_=256);
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set sales.budget ; /the data which you want to divide,for example its records is less then 256*2**/
output test_1;/the data before 256 output to test_1/
o
·
end;
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if _n_=257 then do until(last);
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set sales.budget ; /the data which you want to divide**/
output test_2;/the data after 256 output to test_2/
·
end;
r run;