Well, I'm trying to wrap my head around what really needs to be done here.  Here are a couple of questions.  Maybe your comments will help me figure out what needs to happen. First, what is the difference between what you want and a random sampling of the data set (or perhaps a set of random samples)?  PROC SURVEYSELECT will accomplish this rather easily. Second, what is the purpose of applying RAND("UNIFORM")?  Are you trying to accomplish something more complex, like generating a random sample of all those values that fall into the 70th percentile? Usually, half the battle is figuring out what needs to be solved.  I know you've tried, but a little more explanation would help. ... View more