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 ('Higher Education Authority of Ireland; PRTLI 4 scheme; Enterpise Partnership Scheme; Irish Research Council for Science, Engineering and Technology (IRCSET); HKPB Scientific Ltd') ORA-01722: invalid number