The path you describe ("input data to database query") is most certainly representable by a graph. I'm not sure what you mean by "static graph." I do believe ou

The path you describe ("input data to database query") is most certainly representable by a graph. I'm not sure what you mean by "static graph." I do believe our memory is persistent, "static," and finite. We hold discrete pieces of information and connections between them. Aka, a graph.