INSERT INTO cart (user_id, product_id, spec_id, quantity, custom_sweetness, custom_ice, toppings) VALUES (#{userId}, #{productId}, #{specId}, #{quantity}, #{customSweetness}, #{customIce}, #{toppings}) SELECT c.*, p.id as p_id, p.name as p_name, p.image as p_image, p.base_price as p_base_price, p.merchant_id as p_merchant_id, s.id as s_id, s.spec_name as s_spec_name, s.price_adjust as s_price_adjust FROM cart c LEFT JOIN product p ON c.product_id = p.id LEFT JOIN product_spec s ON c.spec_id = s.id WHERE c.user_id = #{userId} ORDER BY c.create_time DESC SELECT c.*, p.id as p_id, p.name as p_name, p.image as p_image, p.base_price as p_base_price, p.merchant_id as p_merchant_id, s.id as s_id, s.spec_name as s_spec_name, s.price_adjust as s_price_adjust FROM cart c LEFT JOIN product p ON c.product_id = p.id LEFT JOIN product_spec s ON c.spec_id = s.id WHERE c.id = #{id} SELECT * FROM cart WHERE user_id = #{userId} AND product_id = #{productId} AND (spec_id = #{specId} OR (#{specId} IS NULL AND spec_id IS NULL)) AND (custom_sweetness = #{customSweetness} OR (#{customSweetness} IS NULL AND custom_sweetness IS NULL)) AND (custom_ice = #{customIce} OR (#{customIce} IS NULL AND custom_ice IS NULL)) AND (toppings = #{toppings} OR (#{toppings} IS NULL AND toppings IS NULL)) LIMIT 1 UPDATE cart quantity = #{quantity}, custom_sweetness = #{customSweetness}, custom_ice = #{customIce}, toppings = #{toppings}, WHERE id = #{id} UPDATE cart SET quantity = #{quantity} WHERE id = #{id} DELETE FROM cart WHERE id = #{id} DELETE FROM cart WHERE user_id = #{userId} DELETE FROM cart WHERE id IN #{id} AND user_id = #{userId}