Join in update statement

Question

can we use join in update statement?
here is the query which is giving me error
UPDATE      pol_int_name_multiple_v
SET      PMV.client_seq_nbr_i = 1
FROM     pol_int_name_multiple_v PMV
JOIN      pol_int_name PIV
ON      piv.int_name_id = pmv.int_name_id
WHERE      piv.client_id = 5
SQL> /
FROM pol_int_name_multiple_v PMV
ERROR at line 3:
ORA-00933: SQL command not properly ended
Message was edited by:
aadi

Answer 1

Yes, you can. The table with updateble columns must be a key preserved table. See http://download.oracle.com/docs/cd/B10501_01/appdev.920/a96590/adg03sch.htm#1044
Example:
SQL> CREATE TABLE A(A INTEGER PRIMARY KEY);
Table created.
SQL> INSERT INTO A VALUES(1);
1 row created.
SQL> INSERT INTO A VALUES(2);
1 row created.
SQL> COMMIT;
Commit complete.
SQL> CREATE TABLE B(
  2    A INTEGER,
  3    B INTEGER,
  4    FOREIGN KEY(A) REFERENCES A);
Table created.
SQL> INSERT INTO B(A, B) VALUES(1, 5);
1 row created.
SQL> INSERT INTO B(A, B) VALUES(2, 5);
1 row created.
SQL> INSERT INTO B(A, B) VALUES(2, 10);
1 row created.
SQL> COMMIT;
Commit complete.
SQL> SELECT * FROM B;
         A          B
         1          5
         2          5
         2         10
SQL> UPDATE
  2    (
  3      SELECT B.*
  4      FROM A JOIN B ON A.A = B.A
  5      WHERE B.A = 2
  6    )
  7    SET B = 333;
2 rows updated.
SQL> COMMIT;
Commit complete.
SQL> SELECT * FROM B;
         A          B
         1          5
         2        333
         2        333Regards,
Dima