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You can calculate a RANK/ROW_NUMBER based on this logic: ROW_NUMBER() OVER (PARTITION BY IMMS_ID ORDER BY CASE WHEN status='DI' THEN 1 WHEN status='OI' THEN 2 WHEN status='FI' THEN 3 WHEN status='OV' THEN 4 WHEN status='FV' THEN 5 END)



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