Re: SQL MERGE Question

"MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx> wrote on 10/26/2017
02:50:57 PM:

It doesn't make sense to
MERGE INTO

The same table you are
USING (SELECT * FROM)

I understand what you're trying to accomplish, Art, but as Charles
pointed out the MERGE needs to find something. You're trying to save
yourself having to separately check if the row exists before deciding
whether to insert the row or update. When I've done this I joined the
table with another table that had related data in it to use when needing
to insert a new row in the first table. Thus, there would always be a row
for the MERGE to find but one side of the join would be NULL columns if
the row did not exist in the first table. Thus, the MERGE could either
MATCH or NOT MATCH as appropriate. Do you have a related table you can
join to your table?

Sincerely,

Dave Clark