Multiple Column search based on column name

Question

Hi, Can anybody please help me with my issue. I have a table containing about 100 columns, I am using application express. I want to use a textbox for input, and input will be column name i.e. say one of the column name is "PARK" when user type park in that textbox and click on go or search it will display the records for "PARK" column. How can I do that.
I am trying like this - select :P124_PARK_NAME from wp_parks.
it displays the result but display "PARK" instead of actual data for that column. Please help...

Answer 1

I would prefer some thing like this.
SQL> create table hx_test
  2  as
  3  select level as rno
  4    from dual
  5  connect by level <=10
  6  /
Table created.
SQL> create or replace type num_type as table of number
  2  /
Type created.
SQL> create or replace package get_col_val
  2  as
  3     function get(pCol_Name in varchar2, pTable_Name in varchar2) return num_type PIPELINED;
  4  end get_col_val;
  5  /
Package created.
SQL> create or replace package body get_col_val
  2  as
  3      function get(pCol_Name in varchar2, pTable_Name in varchar2) return num_type PIPELINED
  4      as
  5       lcol_val number;
  6       lref_cur sys_refcursor;
  7     begin
  8              open lref_cur for 'select ' || pCol_Name || ' as col from ' || pTable_Name;
  9
10              loop
11                      fetch lref_cur into lcol_val;
12                      exit when lref_cur%notfound;
13                      pipe row (lcol_val);
14              end loop;
15
16              close lref_cur;
17
18              return;
19     end;
20  end get_col_val;
21  /
Package body created.
SQL> select * from table(get_col_val.get('rno','hx_test'))
  2  /
COLUMN_VALUE
           1
           2
           3
           4
           5
           6
           7
           8
           9
          10
10 rows selected.Thanks,
Karthick.