Question

Essentially, I have a query that is responsible for fetching all records (with specific filters) within the last month. I’m using Oracle’s interval keyword and all was working great until today (December 31st, 2009). The code I’m using is

select (sysdate - interval '1' month) from dual

and the error I get it

ORA-01839: date not valid for month specified

How can I use the interval keyword to be compatible with any date? Or if anyone has a better way of approaching the issue, I’m all ears.

Thank you.

Answer 1

try

select add_months(sysdate,-1) from dual