MySQL: How to insert a record for each result in a SQL query?

Question

Say I have a select

SELECT DISTINCT id, customer_id, domain FROM config WHERE type = \'foo\';

which returns some records.

How can I do

Answer 1

INSERT INTO config (id, customer_id, domain)
SELECT id, customer_id, 'www.example.com' FROM (
  SELECT DISTINCT id, customer_id, domain FROM config
  WHERE type = 'foo'
) x;