Tập luyện giữa thành phố lớn

SELECT
    gym_id,
    CASE
        -- Update the locations classified as a Major City
        WHEN location IN ('___', 'Los Angeles', 'Dallas') 
        THEN 'Major City'
        
        -- Otherwise, it's a Non-Major City
        ELSE '___'
    END AS gym_city
FROM CORE_GYM.gyms

-- Complete the WHERE clause to only return Premium gym types
WHERE gym_type = '___';