There's probably a cleaner solution, but one I'm thinking of at a first glance is
StatusB: // loads in memory all possible values of Status BLOAD DISTINCT [Status B] AS CheckBFROM Table; Data:LOAD Member, [Status A], [Status B], IF(EXISTS(CheckB, [Status A]), 1) AS AinB // Check values for Status A in Status BFROM Table; DROP TABLE StatusB;