SELECT INTO and “Undeclared variable” error

Question

When I try to execute following query:

SELECT id_subscriber
  INTO newsletter_to_send
  FROM subscribers 

I get an error:

Answer 1

MySQL does not support the SELECT ... INTO ... syntax.

You have to use the INSERT INTO ... SELECT .. syntax to accomplish there.

Read more here.. http://dev.mysql.com/doc/refman/5.0/en/insert-select.html