"...download CR 2011 Trial version..."
I wish I could. Unfortunately, I'm currently working in a Citrix environment on a vendor's server, so I'm at their mercy regarding what software they provide. I have seen others online complaining of the same issue in CR2011, though, so although I can't test it myself I believe it does exist.
As I said in earlier comments, I have tried the subreport alternative. Sometimes it works, but just takes exponentially longer to run; other times, the report fails for lack of resources. Unfortunately, that just isn't a reliable solution for me. Nor is grouping the report and selectively suppressing to show only the records with the latest date...this would require the download of literally millions of records when only a small fraction of those will actually be displayed in the report.
At this point, I'm reduced to writing manual SQL queries and running them as commands. As there's no real interface in Crystal for writing commands, though, this is also a far from ideal solution. The bottom line here is that the SQL Expressions are far and above the ideal method of achieving what I need...if there's any way to escalate this and have it looked at, that would be incredibly helpful!!