Subject: " Invention of New RDBMS Rule by Shekhar P. Sinha "


Dear Sir,

I have a pleasure to mail to you.

I have found that " In RDBMS-Oracle only one primary key can be

defined in a single table" but " I have found that in RDBMS-Oracle

more than one primary key can be defined ".

To my surprise in all the books of whether Codd's Rdbms or

RDBMS-Oracle it is written that only a single primary key can be

defined and the software of Oracle also follows the same method

of single primary key.

So, in this regard I think there should be " Change of Codd's

RDBMS Rule " since " I have invented that more than one primary

key can be defined in RDBMS-Oracle single table"

My research was very very successfully lab tested on 4th of July, saturday, 2009

I have been trying hard to put this " Research in the world of

RDBMS " for that reason I need your support and help.

I hope that I will get response fromyour kind end.


Thanking you,

with regards,

Shekhar P. Sinha, Guwahati, Assam, India.

email id : shekhar_shk@rediffmail.com

mobile no : +91-0361-98640-63046