INSERT INTO cm_cart (productID, userID, skuId, productCount, ADDTIME,
reBuyFlag, heUserId)
VALUES ((select productId from cm_hehe_sku where skuId = #{skuId}), #{userId}, #{skuId}, #{productCount}, NOW(),
0, #{heUserId})
UPDATE
cm_cart
SET productCount = #{productCount}
WHERE cm_cartID = #{cartId}
update cm_cart
set skuId=#{newSkuId},
productCount=#{count}
where cm_cartID = #{cartId}
DELETE
FROM cm_cart
WHERE cm_cartID = #{cartId}