I'd have to see the underlying tables and some data from them to be sure, but this looks like a usual "pivot" attempt on a "one true lookup" table.
There are better ways to query those.
Can you provide the table definitions and some sample data? (Anonymize the data as needed, but make it as realistic as possible.)
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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