ALTER TABLE `shop_goods` 
ADD COLUMN `usage_instruction` VARCHAR(512) NULL COMMENT '商品使用说明'
AFTER `goods_detail`;

ALTER TABLE `qy_user` 
ADD COLUMN `sys_role_id` BIGINT DEFAULT NULL COMMENT '系统角色id'
AFTER `balance`;

ALTER TABLE `qy_user` 
ADD COLUMN `use_balance` decimal(15,2) NOT NULL DEFAULT '0.00' COMMENT '已使用用户余额'
AFTER `balance`;

ALTER TABLE `qy_user` 
ADD COLUMN `balance_limit` DECIMAL(15,2) NOT NULL DEFAULT '0.00' COMMENT '余额额度' 
AFTER `use_balance`;