Hi -- I have a table Issues containing records for magazine issues each with an IssueNumber, and another table Volumes which contains VolumeNumber and StartIssue specifying the first issue of each volume: vol. 1 starts with issue 1, 2 starts with 27, etc. (Start numbers are specified individually because the volumes contain variable numbers of issues.)
So then, what would be the expression for a query column that, for each issue number, finds which volume it belongs to?