Update On data from multiple Tables

Question

How can i update data from multiple tables(Using a Join)
using a single update statement.

Answer 1

Hii
Suppose i have following tables
create table emp_mas(empno number primary key,name varchar2(30));
create table emp_grad(empno number primary key,grade varchar2(1));
SQL> select * from emp_grad;
EMPNO G
100 A
101 A
102 B
SQL> select * from emp_mas;
EMPNO NAME
100 GREG
101 THOMAS
102 SAM
I would like to update information of employee 'GREG' Using a single update statement as
UPDATE (SELECT E.EMPNO,E.NAME,G.GRADE FROM EMP_MAS E,EMP_GRAD G WHERE E.EMPNO=G.EMPNO) J
SET J.NAME='GREG THOMAS',J.GRADE='B' WHERE EMPNO=100
Then i am getting Error message like this.
ERROR at line 2:
ORA-01776: cannot modify more than one base table through a join view
How can i achieve the result