1.7 migration. Is it backwards compatible by default

I was reading through the 1.7 migration guide. We use the SQL Server JobStore. I have two questions about the upgrade

  1. Will 1.7 work if I do not change my configuration, or run the migration script?
  2. If I need to upgrade the schema, where I can I obtain the migration scripts? We need to use SQL scripts and DACPACS for any database changes, so I am not able to use the run-time job store options to automatically upgrade the schema.

thank you