On Tue, 9 Apr 2002, Peter Atkins wrote:
> I have a column "total_hours | character varying(5) " and I am unable to
> perform the aggrigate function SUM() because of the column type.
> Without changing the type is there a way to convert the datatype by using
> CAST(), to_char() or something simular? So that I may calculate the SUM().
>
> SELECT SUM(total_hours) AS hours FROM my_table WHERE flag='$flag';
I think this may work:
SELECT SUM(to_number(total_hours, '99999')) from my_table where ...