Question

我必须在我的桌子上显示完全缺货产品。这里1号是库存，2号是缺货。在这里，我只需要获取product_id的缺货（2），如果有任何product_id，至少有一行有库存（1），它会认为是库存，否则认为是缺货。

请在此处查看，我已尝试此查询，但结果未按预期进行

Answer 1

我不明白100％的问题，也许这可以帮到你。

这是指向SQLfiddle http://sqlfiddle.com/#!9/75509d/12/0

的链接

SELECT p1.*
FROM price p1
LEFT JOIN price p2
  ON p1.product_id = p2.product_id
  AND p2.stockstatus = 1
WHERE p1.stockstatus = 2
  AND p2.stockstatus IS NULL
ORDER BY p1.product_id ASC

Answer 2

出局股票应

SELECT * 
FROM `price` 
WHERE product_id not in (
       select product_id from `price`  where  stockstatus ='1') 
ORDER BY `product_id` ASC

Answer 3

我认为这应该足够了

select * from price where product_id  NOT IN (select product_id from price where stockstatus = 1)

表名中也不需要撇号。（如果您计划添加更多stockstatuses，请考虑在子查询后添加AND stockstatus = 2

Answer 4

/*CREATE TABLE IF NOT EXISTS `price` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `product_id` int(11) NOT NULL,
  `price` int(11) NOT NULL,
  `stockstatus` int(11) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=innodb  DEFAULT CHARSET=latin1;
INSERT INTO `price` (`id`, `product_id`, `price`, `stockstatus`) VALUES
(1, '100', 1000, '1');
INSERT INTO `price` (`id`, `product_id`, `price`, `stockstatus`) VALUES
(2, '100', 500, '1');
INSERT INTO `price` (`id`, `product_id`, `price`, `stockstatus`) VALUES
(3, '100', 800, '2');
INSERT INTO `price` (`id`, `product_id`, `price`, `stockstatus`) VALUES
(4, '100', 700, '1');
INSERT INTO `price` (`id`, `product_id`, `price`, `stockstatus`) VALUES
(5, '101', 700, '2');
INSERT INTO `price` (`id`, `product_id`, `price`, `stockstatus`) VALUES
(6, '101', 699, '2');
INSERT INTO `price` (`id`, `product_id`, `price`, `stockstatus`) VALUES
(7, '102', 700, '1');
INSERT INTO `price` (`id`, `product_id`, `price`, `stockstatus`) VALUES
(8, '102', 699, '1');
*/

select  s.product_id, s.instock,
            case 
            when s.instock = 0 then 'Out of stock' 
            else 'In Stock'
            end as 'Status'
from
(
select product_id,
         max(case when stockstatus = 1 then 1 else 0 end) as instock
from price
group   by product_id
) s
where   s.instock = 0
;

如何在mysql中排除缺货

4 个答案: