, '主食', 10);
INSERT INTO menu VALUES(NULL, '叉烧包', '主食', 20);
INSERT INTO menu VALUES(NULL, '宫保鸡丁', '热菜...山药拨鱼', '凉菜', 14);
INSERT INTO menu VALUES(NULL, '银丝卷', '甜食', 9);
INSERT INTO menu VALUES(NULL, '水煮鱼', '热菜...AND state = '未结账' LIMIT 0, 1", Bill.class, diningTableId);
return bill !...= null;
}
//完成结账[如果餐桌存在,并且该餐桌有未结账的账单]
//如果成功,返回true, 失败返回 false
public boolean payBill...============");
return;
}
//验证餐桌是否有需要结账的账单
if (!