ปรับราคาสมาชิก

SELECT
    m.user_id,
    m.sign_up_date,
    m.subscription_plan,
    sp.price_per_month AS original_price,

	-- Add a 25% uplift to the existing price per month
    ___ * 1.25 AS twenty_five_percent_uplist,
    
    -- Increase the price_per_month by $5.00 
    ___ ___ ___ AS ___, 
    
    -- Divide the price per month by 2
    ___

FROM CORE_GYM.subscription_plans AS sp
JOIN CORE_GYM.members AS m
    ON sp.subscription_plan = m.subscription_plan;