Re: INSERT Trigger to check for existing records

"David G. Johnston" <david.g.johnston@xxxxxxxxx> · Sat, 21 Nov 2020 11:24:34 -0700

On Saturday, November 21, 2020, David G. Johnston <david.g.johnston@xxxxxxxxx> wrote:
On Saturday, November 21, 2020, Hagen Finley <hagen@xxxxxxxxxxxxxx> wrote:

    David,
    That's an interesting idea. I WOULD like  to retain the OLD
      records that are the same and only INSERT new or changed records.
      Is there a way to compare the old and the new records without a
      trigger?

A where clause?

Did you get the part in the plan where there are two tables, existing and new? You write queries that join the two tables together and use the where clause in those queries to limit records.

David J.