> > how can i add *only* nonexisting entries to my db
> > tables (iow, if it is one of the 100+ there now, i
> > don't want to mess with it)?
>
> I will take a stab at the easy question. Out of test
> solutions, this is the one that I know.
>
> 1. create a temp table using destination table
> schema using the LIKE clause.
>
http://www.postgresql.org/docs/8.1/interactive/sql-createtable.html
>
> 2. import external data into the temp table.
>
> 3. select into destinationtable from temptable where
> temptable.primarykey not exists
> ( select destinationtable.primarykey
> from destination table
> );
Richard, thanks. in my case, the primary key isn't
relevant, however, the product_number is (it is
unique). iiuc, in my case i should use product_number
instead of primarykey.
it makes sense - thanks for the enlightenment.
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