What is the best way to implement soft deletion?

Working on a project at the moment and we have to implement soft deletion for the majority of users (user roles). We decided to add an `is_deleted='0'` field on each table in the database and set it to `'1'` if particular user roles hit a delete button on a specific record. For future maintenance now, each `SELECT` query will need to ensure they do not include records `where is_deleted='1'`. Is there a better solution for implementing soft deletion? Update: I should also note that we have an Audit database that tracks changes (field, old value, new value, time, user, ip) to all tables/fields within the Application database.