modify database table

Hi all,

I've a query regarding the modifying of a data base table directly ( that means without taking the values into the internal table) for a field, particulary when the field is a primary key.

eg: in a field called RICE the initial value is given as '120'. now i want to change it into a new value 'SAP'.

this RICE field is made as a primary key.

please tell me the solution.

Sailaja.