INSERT INTO ... SELECT

Hi,

I would like to insert into a table values from a table and user defined
ones. Here is the example:

I found this statement to insert values from another table:

INSERT INTO test_table (cust_id, cust_name) SELECT id, name from CUSTOMER;

But the test_table has another column, which should have the same value
for all the customers.

Is there something like

INSERT INTO test_table (int_id, cust_id, cust_name) '1', SELECT id, name
from CUSTOMER:

and if so, what ist the correct statement? If not, what is an
alternative to insert a single row at a time?

Thanks in advance

Silke