@BenNafziger wrote: I've recently been learning about proc sql's remerge feature. I wanted to test my knowledge of how it works, so I built and ran this small test case. So, the above discussion should convince you that the quirky behaviour you exposed is not a good example of how remerging is supposed to work. It is a bug which, fortunately, is not met too often in the real world and hopefully will be fixed, someday. ... View more