finalmente ho ottenuto la sintassi Upsert usando MERGE in SQL Server 2008. Utilizzando ciò che Jacob voleva da fare (un Upsert):
IF EXISTS(SELECT * FROM member_topic WHERE mt_member = 0 AND mt_topic = 110)
BEGIN
--update existing row
UPDATE member_topic SET mt_notes = 'test'
WHERE mt_member = 0
AND mt_topic = 110
END
ELSE
BEGIN
--insert new row
INSERT INTO member_topic (mt_member, mt_topic, mt_notes)
VALUES (0, 110, 'test')
END
L'equivalente MERGE la sintassi è:
MERGE member_topic
USING (
VALUES (0, 110, 'test')
) AS foo (mt_member, mt_topic, mt_notes)
ON member_topic.mt_member = foo.mt_member
AND member_topic.mt_topic = foo.mt_topic
WHEN MATCHED THEN
UPDATE SET mt_notes = foo.mt_notes
WHEN NOT MATCHED THEN
INSERT (mt_member, mt_topic, mt_notes)
VALUES (foo.mt_member, foo.mt_topic, foo.mt_notes)
; --A MERGE statement must be terminated by a semi-colon (;).
