UPDATE cdssa SET cnno = CASE WHEN (cnno IS NULL OR TRIM(cnno)='') THEN '${CNNO}' else cnno end,
		stdt = CASE WHEN (stdt IS NULL OR TRIM(stdt)='') THEN '${STDT}' else stdt end,
		eddt = CASE WHEN (eddt IS NULL OR TRIM(eddt)='') THEN '${EDDT}' else eddt end
	WHERE cuno = '${CUNO}';