I think that's because those databases render datetime values into their
"seconds from epoch" values (whichever epoch they use) when casting to a
numeric type (I know MS SQL does. I assume the others do, too.) It seems
that MySQL is the oddball on this issue.
Shawn Green
Database Administrator
Thanks for the detailed explanation which is what I assumed was
happening. Does
it make any sense though? Shouldn't we get some sort of warning for the
implicit cast? I could be wrong but I thought PostgreSQL, Oracle, and SQL
server handled avg(date/time values) correctly.
Quoting [EMAIL PROTE
James Nobis <[EMAIL PROTECTED]> wrote on 04/12/2005
10:19:33 AM:
> Hi all,
>
> Essentially I was asked to look into a problem with a query at the
> office which
> used AVG on a datetime column which produces incorrect results. (MySQL
4.1.10
> on RHEL 3 update 4) As you can see below the star
