ALTER TABLE `shop_goods` 
ADD COLUMN `belong_type` TINYINT NOT NULL DEFAULT 0 COMMENT '归属类型（0-借还柜 1-固资通）' 
AFTER `category_id`;

ALTER TABLE `shop_goods` 
ADD COLUMN `external_goods_id` BIGINT NULL COMMENT '外部归属类型的商品ID' 
AFTER `category_id`;