Selecting record from a variable table

Question

Hi,
I need to display the records from a table and the table name is saved in a variable. I am writing the code like
create or replace procedure test_col as
     t_name VARCHAR2(40);
     V_ID VARCHAR2(10);
     cursor c_table is SELECT TABLE_NAME FROM ALL_TAB_COLS WHERE COLUMN_NAME = 'E_ID';
begin
     OPEN C_TABLE;
     LOOP
          FETCH C_TABLE INTO T_NAME;
          EXIT WHEN C_TABLE%NOTFOUND;
          DBMS_OUTPUT.PUT_LINE(T_NAME);
          SELECT E_ID INTO V_ID FROM T_NAME;
          DBMS_OUTPUT.PUT_LINE(V_ID);
     END LOOP;     
CLOSE C_TABLE;
end;
Its giving the error as table name doesn't exist. Its taking t_name as the table name but i wan to use the value saved in that variable as the table name;
Any help..
Thanks
Ashish

Answer 1

CREATE OR REPLACE PROCEDURE test_col
AS
   t_name   VARCHAR2 (40);
   v_id     VARCHAR2 (10);
   CURSOR c_table
   IS
      SELECT table_name
        FROM all_tab_cols
       WHERE column_name = 'E_ID';
BEGIN
   OPEN c_table;
   LOOP
      FETCH c_table
       INTO t_name;
      EXIT WHEN c_table%NOTFOUND;
      DBMS_OUTPUT.put_line (t_name);
      EXECUTE IMMEDIATE 'SELECT e_id FROM ' || t_name
                   INTO v_id;
      DBMS_OUTPUT.put_line (v_id);
   END LOOP;
   CLOSE c_table;
END;
/