Oracle : Inner Join syntax

[Ravi Kiran Va]

Hi

I am confused with Inner Join syntax .

As per the defination of Inner Join it says that
Inner joins return all rows from multiple tables where the join condition is met.


By going through Inner Join examples in web , Inner join is written in these syntaxes as shown :

First Syntax :

SELECT Person.LastName, Person.FirstName, Sales.OrderNo FROM Person INNER JOIN Sales ON Person.P_Id=Sales.P_Id

Second Syntax :

SELECT suppliers.supplier_id, suppliers.supplier_name, orders.order_date
FROM suppliers, orders
WHERE suppliers.supplier_id = orders.supplier_id;

Please tell me if the keyword Inner Join usage is mandatory or not ??

Thank you .

[Ravi Kiran Va]

I will reply to my question itself :

first is ANSI syntax and second is non ANSI .

As backward compability Oracle is still supporting ANSI syntax.

Please let me know if you have any queries .