The context isn't clear from the page, but data-oriented design mostly comes from the game industry where this level of performance often (but not always) does

The context isn't clear from the page, but data-oriented design mostly comes from the game industry where this level of performance often (but not always) does matter. And in that context, they don't mean "data-oriented" in the sense of "declarative like SQL". They mean it in the sense of "how the bytes are arranged in memory". One of the primary motivations is being able to use the CPU cache well.