ORA-01722: invalid number while using TO_CHAR function.

Question

Hi All,
I was using this query from around past 1 year and everything was working fine.
select to_char ( '2012/12/23','YYYY/MM/DD') from dual;
how ever from monday onwards , this is returning me with the following error.
ORA-01722: invalid number
The NLS_DATE_FORMAT is DD-MON-RR in my oracle 11g version.
Please help me regarding this.

Answer 1

Your date is in literal & your intended format so no need to format it again.
select to_char ( '2012/12/23','YYYY/MM/DD') from dual;
same as
select '2012/12/23' from dual;I don't know your need so same code to work!!!
select to_char(to_date('2012/12/23','YYYY/MM/DD'),'DD/MM/YYYY') from dualsunnymoon wrote:
where vale for ? is coming as '2011/12/23' from java.
the whole application has to be changed and retested.
>
It it comes as a text convert it to date TO_DATE('2011/12/23','YYYY/MM/DD') to use in comparison operators like =, != , > , < etc. Comparison operators used taking date as literal will give you wrong result.
Better to do it right even it takes huge effort.
Edited by: Lokanath Giri on ३ जनवरी, २०१२ १२:०६ अपराह्न