>I'd be tempted to consider keeping the codes in a table and just using a subquery for the condition. It would be pretty flexible, wouldn't have the limitations of a string and the subset of codes could be parameterized in whatever way necessary and the cursor used for the subquery.
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It was already a table and I converted values to string first. I may just go straight with the table. For now I decided to just check directly against the codes in my code below the select statement.