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 ('European Community[FP7/2007-2013, 215483]; Lero - the Irish Software Engineering Research Centre, Science Foundation Ireland[03/CE2/1303.1]') ORA-01722: invalid number