Answer Posted / saraswathi muthuraman

SQL> explain plan for select * from dual;

Explained.

SQL> select
substr (lpad(' ', level-1) || operation || ' (' || options
|| ')',1,30 ) "Operation",
object_name
"Object"
from
plan_table
start with id = 0
connect by prior id=parent_id;


SELECT STATEMENT ()
TABLE ACCESS (FULL)
DUAL

2 rows selected.

> CREATE OR REPLACE FUNCTION FACTORIAL_1(factstr varchar2 ) 2 RETURN NUMBER AS 3 new_str VARCHAR2(4000) := factstr||'*' ; 4 fact number := 1 ; 5 BEGIN 6 7 WHILE new_str IS NOT NULL 8 LOOP 9 fact := fact * TO_NUMBER(SUBSTR(new_str,1,INSTR(new_str,'*')-1)); 10 new_str := substr( new_str,INSTR(new_str,'*')+1); 11 END LOOP; 12 13 RETURN fact; 14 15 END; explanation Above program?

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