How can i update all column of table without know it's structure

hi to all
i want to make update to all columns of table with record type of this table
ex- consider the emp table and contain any number of columns
and you make record is row type of this table (emp) as emp_rec
and fech in it any record by select * from emp
and i want to update another record this the return record from data base as
update emp by using the emp_rec
i want to know how this will be acheive

It is all written in the docs:
http://download-uk.oracle.com/docs/cd/B19306_01/appdev.102/b14261/collections.htm#i20479
Although updating all columns for a table is VERY, VERY BAD practice.
Gints Plivna
http://www.gplivna.eu

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Etbin wrote:
Hi, Frank
taking nulls into account, what if some attributes are null ;) then the query should look like
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How can i update all column of table without know it's structure

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