Oracle SQL: How to INSERT a SELECT statement with a GROUP BY clause on a table with IDENTITY column?

Question

In an application, I intend on truncating and inserting on an Oracle 12c database, but have found this issue with an IDENTITY column. Even though the INSE

Answer 1

In the Oracle Community, this question has been answered. https://community.oracle.com/message/13227544#13227544

insert into T1 (owner_name, pet_count)
with t as (select /*+ materialize */ owner_name, count(*) as pet_count from aux group by owner_name)
select owner_name, pet_count from t

Quoting the original answer, keep in mind the materialize hint is not documented. Thanks to all for your help!