Adding an extra column value with INSERT … SELECT in MySQL

Question

I have two tables and my goal is to move specific data from the first table into the second table along with a reason for why that data was moved. For instance:

Answer 1

Try this query:

INSERT INTO bad_data_table VALUES (
(SELECT * FROM raw_data_table WHERE id IS NULL LIMIT 1), "The ID is NULL");

The subquery here needs to have 1 row!

Answer 2

INSERT INTO bad_data_table 
SELECT *, 'The ID is NULL' AS Reason
FROM raw_data_table
WHERE id IS NULL;