How to disabled all constraints when importing data (urgent)

[paul sun]

Hi:

I am not sure whether somebody can sort it out for me.

I am doing data transfer from one oracle database to another. Both of
them has the same structure (like same tables etc).the only thing i
need to do is data transfering.

i designed a vb program to do this, What i am worrying is when I run
this program it might fire some constrants. Anybody can give me some
ideas on how to avoid these constraints when data import?? I have to
disable all the constrainsts first or i can do it in another way?

Millions thanks in advance!
Paul