select statement inside a insert statement

I tried the below sql query

INSERT INTO test.ACT_QUERY values(2139,2,'SELECT ''D'',ORDER_ID from dual');

When a java program run this select statement from test.ACT_QUERY table and spools to a output file it gives开发者_如何学编程 a "D", 123. I just want D,123. Not sure why the quotes are coming up. What i need to replace in the select statement to get the output as D,123

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It is difficult to visualize your problem. Certainly there is nothing wrong in principle with what you're doing, and it works in PL/SQL.

Here is your test data, slightly tweaked to run in my DB:

SQL> INSERT INTO ACT_QUERY values(2139,2,'SELECT ''D'', DUMMY from dual');

1 row created.

SQL> select * from act_query
  2  /

        ID       BLAH
---------- ----------
QRY_TXT
--------------------------------------------------------------------------------
      2139          2
SELECT 'D', DUMMY from dual


SQL>

Let's roll!

SQL> begin
  2      for r in (select * from
  3
  4  .
SQL> declare
  2      v1 char(1);
  3      v2 char(1);
  4  begin
  5      for r in (select * from act_query)
  6      loop
  7          execute immediate r.qry_txt into v1, v2;
  8          dbms_output.put_line(r.qry_txt);
  9          dbms_output.put_line('v1='||v1||'::v2='||v2);
 10      end loop;
 11  end;
 12  /
SELECT 'D'as D, DUMMY from dual
v1=D::v2=X

PL/SQL procedure successfully completed.

SQL>

So, you need to explain your situation in a bit more detail, with cut'n'paste of actual output.