Sekvence v rámci SQL Select

Sekvence nelze použít v dotazech s ORDER BY .

Odstraňte ORDER BY nebo vložte do poddotazu:

SELECT  q.*, customer_id_seq.nextval    
FROM    (
        SELECT  c.cust_name,
                c.site
        FROM    customer c
        WHERE   c.customer_id IS NULL
        ORDER BY
                c.site_code ASC
        ) q