Oracle equivalent query for this postgress query - CONFLICT

Question

Following is a query from postgress.

CREATE TABLE testing2 (
    testing2_id INT PRIMARY KEY,
    description varchar(50)
);

INSERT INTO testing2(testing2_id,description) values (1,'NEW') 
ON CONFLICT (testing2_id) DO UPDATE SET description = 'UPDATE';

Does oracle provide an equivalent for conflict (upsert)?