Help me in for subquery

Question

Hi all,
I have a problem in SQL statement.
I have 2 table.
Record -- > name of table 1
table_name -- > field in the table 1
List_Name --> name of table 2
name_person --> field in the table 2
Table 1 is store the name of table 2. It contains only one value(name of the table) at one time.
So the value in the field table _name in table Record is List_Name
Are Select * from List_Name equals to Select * from (Select table_name from record)?
How i want to modify my sql statement
Select * from (Select table_name from record) ?

Answer 1

Are Select * from List_Name equals to Select * from (Select table_name from record)?No.
How i want to modify my sql statement
Select * from (Select table_name from record) ? You have to use native dynamic SQL & cursor variables or DBMS_SQL package
to get the result:
SQL> create table tab1 ( name varchar2(20));
Table created.
SQL> insert into tab1 values('dept');
1 row created.
SQL> var rc refcursor
SQL> declare
  2   tabname varchar2(20);
  3  begin
  4   select name into tabname from tab1 where rownum = 1;
  5   open :rc for 'select * from ' || tabname;
  6  end;
  7  /
PL/SQL procedure successfully completed.
SQL> print rc
    DEPTNO DNAME          LOC
        10 ACCOUNTING     NEW YORK
        20 RESEARCH       DALLAS
        30 SALES          CHICAGO
        40 OPERATIONS     BOSTONhttp://download-east.oracle.com/docs/cd/B10501_01/appdev.920/a96624/06_ora.htm#1510
http://download-east.oracle.com/docs/cd/B10501_01/appdev.920/a96624/11_dynam.htm#10961
http://download-east.oracle.com/docs/cd/B10501_01/appdev.920/a96612/d_sql.htm#998100
Rgds.