sas - Split a dataset into two new dataset based on percentage of split -

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i want split large dataset randomly 2 new dataset in ratio of 70% - 30%.

basically need allocate 70% of random values large dataset newdataset1 , 30% of random values largedataset newdataset2.

can please sas code me achieve it.

a dummy code help..

proc sql or sas statement. work me.

for complex sample design (like stratified randomization, e. g.) proc surveyselect way go, @keith said. simple random splitting rantbl-function trick:

  data newdataset1 newdataset2;     set have;     flag=rantbl(-1, 0.7, 0.3);     if flag=1 output newdataset1;     else output newdataset2;   run;

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