Function Vs Proc

Question

procedure has OUT parameters
though function has returning a single value using return we also can have
out parameters in function also..
so what is the criteria whether to go for function or procedure??

Answer 1

Also, when used in a SQL, the function cannot have any DML inside its implementation. or else it will give an error like this.
SQL> create table r (x varchar2(10));
Table created.
SQL> create function p return number as
2 begin
3 insert into r values ('oregon');
4 commit;
5 return 123;
6 end p;
7 /
Function created.
SQL> select p from dual;
select p from dual
ERROR at line 1:
ORA-14551: cannot perform a DML operation inside a query
ORA-06512: at "RAHUL.P", line 3
SQL> create or replace function p return number as
2 begin
3 return 123;
4 end p;
5 /
Function created.
SQL> select p from dual;
P
123
Message was edited by:
rputtagunta