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 ('Limerick Mental Health services; Astra-Zeneca; Smith-Kline Beecham; Eli-Lilly; Novartis; Wyeth; Bristol-Meyers Pharmaceuticals, Ltd; NIH') ORA-01722: invalid number