Update SQL with two tables in Oracle

Question

I have a sql like this

UPDATE A
SET A.TEMSILCI_KOD = 4
FROM S_MUSTERI A, S_TEKLIF B
WHERE A.TEMSILCI_KOD = 9
AND B.BAYI_KOD = 17
AND A.HESAP_NO = B.HESAP_NO

But i getting an error like this

Error starting at line 8 in command:
UPDATE A
SET A.TEMSILCI_KOD = 4
FROM S_MUSTERI A, S_TEKLIF B
WHERE A.TEMSILCI_KOD = 9
AND B.BAYI_KOD = 17
AND A.HESAP_NO = B.HESAP_NO
Error at Command Line:9 Column:22
Error report:
SQL Error: ORA-00933: SQL command not properly ended
00933. 00000 -  "SQL command not properly ended"
*Cause:    
*Action:

Where is the ERROR?

Answer 1

Maybe something like

UPDATE S_MUSTERI
SET TEMSILCI_KOD = 4
WHERE TEMSILCI_KOD = 9
AND EXISTS (SELECT 1 FROM S_TEKLIF B
WHERE S_MUSTERI.HESAP_NO = B.HESAP_NO
AND B.BAYI_KOD = 17)

Answer 2

In Oracle the syntax to update a view is different from SQL*Server's syntax. In Oracle you could issue the following query:

UPDATE (SELECT A.TEMSILCI_KOD
          FROM S_MUSTERI A, S_TEKLIF B
         WHERE A.TEMSILCI_KOD = 9
           AND B.BAYI_KOD = 17
           AND A.HESAP_NO = B.HESAP_NO)
   SET TEMSILCI_KOD = 4

Note: This query will only work in Oracle if (S_TEKLIF.BAYI_KOD, S_TEKLIF.HESAP_NO) is unique (so that the update will not be ambiguous and each row from S_MUSTERI will be updated at most once).