diff --git a/db-migrate.sql b/db-migrate.sql

index cc2fc41..ba8d6b9 100644

--- a/db-migrate.sql

+++ b/db-migrate.sql

@@ -1,3 +1,9 @@

+-- Note: This file contains SQL statements for migrating between versions.

+-- You should not run all of them. Depending on what you are upgrading

+-- from/to, choose the appropriate statements from this file and run them

+-- manually. For instance, you could copy/paste them into an interactive

+-- MariaDB prompt.

+

-- Migration from v1 to v2 --

ALTER TABLE users ADD COLUMN email_inter INT DEFAULT 30;

ALTER TABLE users ADD COLUMN email_range VARCHAR(30) DEFAULT '';