How to: Rolling Back Migrations
By default, dbmate doesn't know how to roll back a migration. In development, it's often useful to be able to revert your database to a previous state. To accomplish this, implement the `migrate:down` section:

```sql
-- migrate:up
create table users (
  id integer,
  name varchar(255),
  email varchar(255) not null
);

-- migrate:down
drop table users;
```

Run `dbmate rollback` to roll back the most recent migration:

```sh
$ dbmate rollback
Rolling back: 20151127184807_create_users_table.sql
Rolled back: 20151127184807_create_users_table.sql in 123µs
Writing: ./db/schema.sql
```