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 ('The Irish Research Council for Science, Engineering and Technology; European Regional Development Fund (ERDF) INTERREG IIIA Ireland/Wales Programme 2000-2006') ORA-01722: invalid number