[xwowsersx]

Unless I misunderstood something, I'm not sure I understand the relevance here. I assumed we were talking about sending data to clients. In such cases, you do not send database tables. Instead, you send rich, fully hydrated objects which are the result of joining those tables. The serialized representation can be backed by the relational model, but at some point you have to put those together to send something useful to the client. My only point is that CSV is unsuitable for this task in many/most cases.