Difference between use of IS and AS while creating a Package or Procedure

Question

Hi,
Had an interview in one of the company.
They asked me this, "What is the difference between using IS and AS while creating Package or Stored Procedure ?".
I checked creating package with same IS and AS, but there is no issues.
Kindly clarify me on this.
Lots of thanks in advance.
Regards,
Shiva

Answer 1

>
Had an interview in one of the company.
They asked me this, "What is the difference between using IS and AS while creating Package or Stored Procedure ?".
>
Quite frankly my first response to them would be: why do you even care?
That would be quickly followed by: do you have any meaningful questions you would like to ask? Perhaps something that might actually be relevant to what you do here?
I personally don't care if someone has memorized the syntax required to create DDL/DML. I care whether they know how and when to use it.
Check the docs for the syntax diagram and from at least 9i on it will be similar to this from 9i
http://docs.oracle.com/cd/B10501_01/appdev.920/a96624/08_subs.htm
>
A procedure is a subprogram that performs a specific action. You write procedures using the syntax:
[CREATE [OR REPLACE]]
PROCEDURE procedure_name[(parameter[, parameter]...)]
[AUTHID {DEFINER | CURRENT_USER}] {IS | AS}
[PRAGMA AUTONOMOUS_TRANSACTION;]
[local declarations]
BEGIN
executable statements
[EXCEPTION
exception handlers]
END [name];
>
Here is the link for 11g
http://docs.oracle.com/cd/B28359_01/appdev.111/b28370/create_procedure.htm
Note that the syntax for some objects requires one or the other and will not accept both.
>
CURSOR x IS ...
TYPE x IS ...
SUBTYPE x IS ...
CREATE TABLE x AS subquery
SELECT x AS "y" FROM z AS "w"
WITH x AS (SELECT ...