I have a number of code value tables that contain a code and a description with a Long id.
I now want to create an entry for an Account Type that references a number of codes, so I have something like this:
insert into account_type_standard (account_type_Standard_id, tax_status_id, recipient_id) ( select account_type_standard_seq.nextval, ts.tax_status_id, r.recipient_id from tax_status ts, recipient r where ts.tax_status_code = ? and r.recipient_code = ?) This retrieves the appropriate values from the tax_status and recipient tables if a match is found for their respective codes. Unfortunately, recipient_code is nullable, and therefore the ? substitution value could be null. Of course, the implicit join doesn’t return a row, so a row doesn’t get inserted into my table.
I’ve tried using NVL on the ? and on the r.recipient_id.
I’ve tried to force an outer join on the r.recipient_code = ? by adding (+), but it’s not an explicit join, so Oracle still didn’t add another row.
Anyone know of a way of doing this?
I can obviously modify the statement so that I do the lookup of the recipient_id externally, and have a ? instead of r.recipient_id, and don’t select from the recipient table at all, but I’d prefer to do all this in 1 SQL statement.
Outter joins don’t work ‘as expected’ in that case because you have explicitly told Oracle you only want data if that criteria on that table matches. In that scenario, the outter join is rendered useless.
A work-around
[Edit] If you expect multiple rows from a sub-select, you can add ROWNUM=1 to each where clause OR use an aggregate such as MAX or MIN. This of course may not be the best solution for all cases.
[Edit] Per comment,
can be just