Update a table from a view (WITH)

Question

Hello,
Is the below valid? Can I update table1 from table2 (view)?
Oracle is 9i
UPDATE
WITH t2 AS (
SELECT....................
SELECT t1.name n1, t2.name n2
FROM cell_info t1, t2
WHERE t1.cell = t2.cell
AND t1.name IS NULL
SET n1 = n2;
SQL Error: ORA-01732: data manipulation operation not legal on this view
01732. 00000 - "data manipulation operation not legal on this view"

Answer 1

Hi,
there are cases where you can update an inline view :Scott@my10g SQL>create table t1 as select level id, chr(96+level) val
  2  from dual
  3  connect by level <= 6
  4  /
Table created.
Scott@my10g SQL>create table t2 as select level id, cast(null as varchar2(30)) val
  2  from dual
  3  connect by level <= 6
  4  /
Table created.
Scott@my10g SQL>alter table t1 add constraint t1_pk primary key (id);
Table altered.
Scott@my10g SQL>alter table t2 add constraint t2_pk primary key (id);
Table altered.
Scott@my10g SQL>select * from t1;
        ID VAL
         1 a
         2 b
         3 c
         4 d
         5 e
         6 f
6 rows selected.
Scott@my10g SQL>select * from t2;
        ID VAL
         1
         2
         3
         4
         5
         6
6 rows selected.
Scott@my10g SQL>update (
  2  select t1.id, t1.val t1val, t2.val t2val
  3  from t1
  4  join t2
  5  on t1.id=t2.id
  6  )
  7  set t2val=t1val
  8  /
6 rows updated.
Scott@my10g SQL>select * from t2;
        ID VAL
         1 a
         2 b
         3 c
         4 d
         5 e
         6 f
6 rows selected.