Executing String which has SELECT statement

Question

String stmt:='Select * from Table a';
How do I execute the select statement present in the string.
Thanks for the help in advance

Answer 1

In most cases this is something you should not be doing on a regular basis. Also when using dynamic sql, take care to use bind variables.
SQL> create or replace function f (p_stmt varchar2)
  2  return sys_refcursor as
  3    c sys_refcursor;
  4  begin
  5    open c for p_stmt;
  6    return c;
  7  end;
  8  /
Function created.
SQL> var c refcursor
SQL> exec :c := f('select * from emp')
PL/SQL procedure successfully completed.
SQL> print c
EMPNO ENAME      JOB          MGR HIREDATE     SAL   COMM DEPTNO
  7369 SMITH      CLERK       7902 17-DEC-80    800            20
  7499 ALLEN      SALESMAN    7698 20-FEB-81   1600    300     30
  7521 WARD       SALESMAN    7698 22-FEB-81   1250    500     30
  7566 JONES      MANAGER     7839 02-APR-81   2975            20
  7654 MARTIN     SALESMAN    7698 28-SEP-81   1250   1400     30
  7698 BLAKE      MANAGER     7839 01-MAY-81   2850            30
  7782 CLARK      MANAGER     7839 09-JUN-81   2450            10
  7788 SCOTT      ANALYST     7566 09-DEC-82   3000            20
  7839 KING       PRESIDENT        17-NOV-81   5000            10
  7844 TURNER     SALESMAN    7698 08-SEP-81   1500      0     30
  7876 ADAMS      CLERK       7788 12-JAN-83   1100            20
  7900 JAMES      CLERK       7698 03-DEC-81    950            30
  7902 FORD       ANALYST     7566 03-DEC-81   3000            20
  7934 MILLER     CLERK       7782 23-JAN-82   1300            10
14 rows selected.
SQL>Given the example in the question, execute immediate wouldn't work, unless the table only had one row or bulk collect was used.