ORA-1839 date not validfor month

Question

I am getting ORA-1839 date not valid for month specified for fallowing query
select      message_id,value_dt from tms_view_fx1
where     TRUNC(to_date('20061124','YYYYMMDD') - TO_DATE(value_dt,'YYYYMMDD')) >=1
what will be the solution please help

Answer 1

Well the real solution is to stop using a string datatype to hold date values.
Your problem is that you have values in that column which either do not hold dates or else hold dates in a different format to the one you sre using in that mask. As a work around you will need to build a user defined function to trap the exception and use that in your query instead.
Cheers, APC
P.S. Why are you using TRUNC()? If you don't include a time element in the string the date is TRUNC-ed already.