SELECT ALA.LEAD_ID , ALA.LEAD_NUMBER , ALA.STATUS , NVL(ALA.DESCRIPTION , ALA.LEAD_NUMBER) FROM AS_LEADS_ALL ALA UNION ALL (SELECT TO_NUMBER(FL.LOOKUP_CODE) LEAD_ID , FL.MEANING LEAD_NUMBER , NULL , FL.DESCRIPTION DESCRIPTION FROM FND_LOOKUPS FL WHERE FL.LOOKUP_TYPE = 'BIL_VALUE_TYPE' AND FL.LOOKUP_CODE = '-999' ) WITH READ ONLY