Note: the results of a search are not a database per say, they are an interpretation of a database. At risks of falling down the analogy hole again, it's somewhat like an artist's work is an interpretation of the material he uses. He doesn't copyright the clay, but he inherently owns copyright of what he produced from it. Like I feel Google does with their search results of a database of websites (as does DuckDuckGo, Bing, etc.)