ORA-01722: invalid number - select description from (SELECT NULL OBJECT_ID, ' -- Select Funding Body -- ' DESCRIPTION FROM DUAL UNION SELECT OBJECT_ID, BODY_NAME DESCRIPTION FROM VA_FUNDING_BODY WHERE SYSDATE BETWEEN START_DATE AND NVL(END_DATE, SYSDATE+1) ORDER BY 2) where object_id in ('National Institutes of Health[K23 AI01846]; University of Washington National Institutes of Health STD Cooperative Research Center[AI31448]; Division of STD Prevention, National Center for HIV, STD, and Tuberculosis Prevention, Centers for Disease Control and Prevention') ORA-01722: invalid number