MySQL 脚本触发错误 #1241

Question

我有下面的脚本，它应该为已提供的 ID 数组获取价格。

但它需要得到1每 ID 的价格，棘手的部分是，我希望能够安排价格更新。

这意味着它需要采用 <= UTC_TIMESTAMP 的价格小于或等于当前时间。

SELECT 
`product_pricing`.`wo_id`,
`product_pricing`.`currency` AS price2_currency,
`product_pricing`.`price` AS price2,
`product_pricing`.`formula_id`,
`product_pricing`.`vat_calculated` AS price2_vat_calculated,
`product_pricing`.`vat_id`,
`product_pricing`.`timestamp_valid`,

`product_price_formulas`.`formula_id`,
`product_price_formulas`.`formula` price2_formula

FROM 
`product_pricing`

LEFT JOIN `product_price_formulas` 
ON `product_pricing`.`formula_id` = `product_price_formulas`.`formula_id`

WHERE 
`product_pricing`.`wo_id` IN (

    SELECT 
    `product_pricing`.`wo_id`,
    `product_pricing`.`timestamp_valid`

    FROM `product_pricing`

    WHERE 
    `product_pricing`.`wo_id` 
        IN ('015724', '028791', '015712', '015715', '015717', '039750', '028791')
    AND `product_pricing`.`timestamp_valid` <= UTC_TIMESTAMP

    ORDER BY `product_pricing`.`timestamp_valid` DESC        
 )

这可能吗？

---

示例数据:电流输出

——————————————————————————————————————————————————————————————————
 | wo_id    | price2    | timestamp_valid 
——————————————————————————————————————————————————————————————————
 | 028791   | 8000      | 2018-03-20 19:55:41
 | 028791   | 6000      | 2018-04-01 19:55:41
 | 028791   | 4000      | 2018-04-20 19:55:41
 | 015724   | 3000      | 2018-04-18 19:55:41
 | 015724   | 1500      | 2018-03-01 19:55:41
 ....

想要的输出:

——————————————————————————————————————————————————————————————————
 | wo_id    | price2    | timestamp_valid 
——————————————————————————————————————————————————————————————————
 | 028791   | 6000      | 2018-04-01 19:55:41
 | 015724   | 1500      | 2018-03-01 19:55:41

Answer 1

我猜你的问题出在 IN 子句上。

您在 IN 子句中选择了两个字段。

编辑

您需要通过 wo_id 和 Max timestamp_valid 自行加入子查询。

SELECT 
    `product_pricing`.`wo_id`,
    `product_pricing`.`currency` AS price2_currency,
    `product_pricing`.`price` AS price2,
    `product_pricing`.`formula_id`,
    `product_pricing`.`vat_calculated` AS price2_vat_calculated,
    `product_pricing`.`vat_id`,
    `product_pricing`.`timestamp_valid`,
    `product_price_formulas`.`formula_id`,
    `product_price_formulas`.`formula` price2_formula
FROM 
`product_pricing`
LEFT JOIN `product_price_formulas` ON `product_pricing`.`formula_id` = `product_price_formulas`.`formula_id`
INNER JOIN 
(
    SELECT 
        `product_pricing`.`wo_id`,
        MAX(`timestamp_valid`) AS MaxDate
    FROM `product_pricing`
    WHERE 
        `product_pricing`.`timestamp_valid` <= UTC_TIMESTAMP
    GROUP BY 
        `product_pricing`.`wo_id`
)as temp ON temp.wo_id = `product_pricing`.`wo_id` AND temp.MaxDate = `product_pricing`.`timestamp_valid`
WHERE  
    `product_pricing`.`wo_id` IN ('015724', '028791', '015712', '015715', '015717', '039750', '028791')