Oracle -- WITH CLAUSE => MERGE? (Syntax-Fehler, )

Sie können die WITH-Klausel nur in einer SELECT-Anweisung verwenden. Siehe die Dokumentation hier. :

Sie können also so etwas tun (11g getestet):

MERGE INTO animalia d
USING (WITH X AS 
       (SELECT  'moo' AS COW, 'woof' AS CAT, 
                (SELECT MAX( DECIBELS ) 
                   FROM ANIMALIA 
                  WHERE COW = 'moo' ) AS DECIBELS
          FROM DUAL )
       SELECT * FROM X) q ON (1 = 1)
 WHEN MATCHED THEN UPDATE SET d.cow = q.cow||' and more';