How to change the tablename at runtime?

Hi
IN _10gR2_
I would like to know if there is a way to change the tablename at runtime - other than using dynamic sql.
These table have similar structure except the tablename iteself.
For ex. depending on where we get a request we want to look/update different table:
if request_from x then
select * from table where ....
or it could be update or insert statement here
end if;
if request from y then
select * from table_y where ....
or it could be update or insert statement here
end if;
Thanks

user565033 wrote:
sorry, this is not an optionWell the best you'll get is something like...
SQL> select * from emp;
     EMPNO ENAME      JOB              MGR HIREDATE           SAL       COMM     DEPTNO
      7369 SMITH      CLERK           7902 17-DEC-1980        800                    20
      7499 ALLEN      SALESMAN        7698 20-FEB-1981       1600        300         30
      7521 WARD       SALESMAN        7698 22-FEB-1981       1250        500         30
      7566 JONES      MANAGER         7839 02-APR-1981       2975                    20
      7654 MARTIN     SALESMAN        7698 28-SEP-1981       1250       1400         30
      7698 BLAKE      MANAGER         7839 01-MAY-1981       2850                    30
      7782 CLARK      MANAGER         7839 09-JUN-1981       2450                    10
      7788 SCOTT      ANALYST         7566 19-APR-1987       3000                    20
      7839 KING       PRESIDENT            17-NOV-1981       5000                    10
      7844 TURNER     SALESMAN        7698 08-SEP-1981       1500          0         30
      7876 ADAMS      CLERK           7788 23-MAY-1987       1100                    20
      7900 JAMES      CLERK           7698 03-DEC-1981        950                    30
      7902 FORD       ANALYST         7566 03-DEC-1981       3000                    20
      7934 MILLER     CLERK           7782 23-JAN-1982       1300                    10
14 rows selected.
SQL> select * from emp2;
     EMPNO ENAME      JOB              MGR HIREDATE           SAL       COMM     DEPTNO
      7369 SMITH      CLERK           7902 17-DEC-1980          0                    20
      7499 ALLEN      SALESMAN        7698 20-FEB-1981          0        300         30
      7521 WARD       SALESMAN        7698 22-FEB-1981          0        500         30
      7566 JONES      MANAGER         7839 02-APR-1981          0                    20
      7654 MARTIN     SALESMAN        7698 28-SEP-1981          0       1400         30
      7698 BLAKE      MANAGER         7839 01-MAY-1981          0                    30
      7782 CLARK      MANAGER         7839 09-JUN-1981          0                    10
      7788 SCOTT      ANALYST         7566 19-APR-1987          0                    20
      7839 KING       PRESIDENT            17-NOV-1981          0                    10
      7844 TURNER     SALESMAN        7698 08-SEP-1981          0          0         30
      7876 ADAMS      CLERK           7788 23-MAY-1987          0                    20
      7900 JAMES      CLERK           7698 03-DEC-1981          0                    30
      7902 FORD       ANALYST         7566 03-DEC-1981          0                    20
      7934 MILLER     CLERK           7782 23-JAN-1982          0                    10
14 rows selected.
SQL> with req as (select &required_table as req from dual)
2 --
3 select * from emp, req where req = 1 union all
4 select * from emp2, req where req = 2
5 /
Enter value for required_table: 1
old   1: with req as (select &required_table as req from dual)
new   1: with req as (select 1 as req from dual)
     EMPNO ENAME      JOB              MGR HIREDATE           SAL       COMM     DEPTNO        REQ
      7369 SMITH      CLERK           7902 17-DEC-1980        800                    20          1
      7499 ALLEN      SALESMAN        7698 20-FEB-1981       1600        300         30          1
      7521 WARD       SALESMAN        7698 22-FEB-1981       1250        500         30          1
      7566 JONES      MANAGER         7839 02-APR-1981       2975                    20          1
      7654 MARTIN     SALESMAN        7698 28-SEP-1981       1250       1400         30          1
      7698 BLAKE      MANAGER         7839 01-MAY-1981       2850                    30          1
      7782 CLARK      MANAGER         7839 09-JUN-1981       2450                    10          1
      7788 SCOTT      ANALYST         7566 19-APR-1987       3000                    20          1
      7839 KING       PRESIDENT            17-NOV-1981       5000                    10          1
      7844 TURNER     SALESMAN        7698 08-SEP-1981       1500          0         30          1
      7876 ADAMS      CLERK           7788 23-MAY-1987       1100                    20          1
      7900 JAMES      CLERK           7698 03-DEC-1981        950                    30          1
      7902 FORD       ANALYST         7566 03-DEC-1981       3000                    20          1
      7934 MILLER     CLERK           7782 23-JAN-1982       1300                    10          1
14 rows selected.
SQL> /
Enter value for required_table: 2
old   1: with req as (select &required_table as req from dual)
new   1: with req as (select 2 as req from dual)
     EMPNO ENAME      JOB              MGR HIREDATE           SAL       COMM     DEPTNO        REQ
      7369 SMITH      CLERK           7902 17-DEC-1980          0                    20          2
      7499 ALLEN      SALESMAN        7698 20-FEB-1981          0        300         30          2
      7521 WARD       SALESMAN        7698 22-FEB-1981          0        500         30          2
      7566 JONES      MANAGER         7839 02-APR-1981          0                    20          2
      7654 MARTIN     SALESMAN        7698 28-SEP-1981          0       1400         30          2
      7698 BLAKE      MANAGER         7839 01-MAY-1981          0                    30          2
      7782 CLARK      MANAGER         7839 09-JUN-1981          0                    10          2
      7788 SCOTT      ANALYST         7566 19-APR-1987          0                    20          2
      7839 KING       PRESIDENT            17-NOV-1981          0                    10          2
      7844 TURNER     SALESMAN        7698 08-SEP-1981          0          0         30          2
      7876 ADAMS      CLERK           7788 23-MAY-1987          0                    20          2
      7900 JAMES      CLERK           7698 03-DEC-1981          0                    30          2
      7902 FORD       ANALYST         7566 03-DEC-1981          0                    20          2
      7934 MILLER     CLERK           7782 23-JAN-1982          0                    10          2
14 rows selected.
SQL>Otherwise you'll have to perhaps use a few "alter table rename..." ddl's to switch the table names around prior to your query.

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