判定购买意图

SELECT
    name,
    unit_price,
    CASE
        -- Inexpensive Rock and Pop songs are always high-intent
        WHEN ___ = ___ AND genre_id IN (___, ___) THEN '___'
        -- Shorter, non-EDM tracks have neutral buyer intent
        ___ milliseconds < ___ ___ ___ != ___ ___ '___'
		-- Everything else is low
        ___ '___'
    END AS buyer_intent
FROM store.track;