On Fri, Sep 12, 2003 at 10:55:17 -0700, "G. Ralph Kuntz, MD" <grk@usa.net> wrote:
> Is it possible to make a single SQL statement that will insert a row
> if it does not already exist, otherwise it will just update the
> fields?
No.
> Actually, just a statement that will not give an error about duplicate
> keys would be enough for my application.
This you can do by using a select statement that checks if the primary
key is a duplicate on the insert statement. An example was posted on
one of the lists about a week ago.
Note that there are conncurrency issues with doing this. Either you want
to exclusively lock the table or use serializable isolation and be
prepared to retry after failures.