So you want DB RAML CRUD operations?
Are you familiar with REST, how to apply it to API design, etc?
There are a ton of examples including the tutorials that can explain a lot of this to you. Typically you are going to match up HTTP methods like POST, PUT, DELETE to CRUD operations. POST is usually used to create something, PUT to update/replace, DELETE is obvious as is GET. I wont duplicate the RAML here as I said most of the examples show how to apply those in RAML.