I've got two database on different network. They can't see each other. So I can't use a Db Link.
Does toad or any other tool allow me to copy data from one db to the other one simulating a db link (it would be really simple simply executing a select on first DB and an insert on the second DB).
Toad can do it easily - instructions are for ver 11. First, connect to both databases using Toad. Then, find the table(s) in question in the Schema Browser. Right click on the table name, click 'Copy Data to Another Schema'. Choose the correct source/destination schemas, and set the options for the copy (triggers/constraints enable/disable, etc). Then click the green Play button and watch the records fly!