will a primary key change be reflected in the existing records?

[lrg]

i created a table with 2 columns as primary key and inserted 100 records. now i want to include one more column as primary key. Will this change be reflected in the existing records or i've to reinsert these records so as to make the change in primary key reflect on these 100 records?

thanks in advance,
lrg.

[debasisdas]

Have you created a composit primary key ?

[lrg]

earlier i created it as a composite key with 2 columns.. now i want 2 include one more column to it

[Saii]

yes, you can alter provided adding the new column does not violate the PK.