OK, new twist:
I want to look at a group of records that share a COMPLEXID. I want to know if at least one record has an XWALK of ESS, RSS, or REM. Then if it has at least one XWALK of EEM, EEM_LOW, LAG-O, LAG-C, LAG/EEM-O, or LAG/EEM-C. Then if it has at least one XWALK = INT. Then, out of...