Question

我试图计算活跃销售订单中的库存数量，这些订单存储在xcart_order_details中。我还想只计算x天内订单中的库存，这些订单的状态为已处理过的＆＃39; P＆＃39;或排队＆＃39; Q＆＃39;以及股票类型是否与某些地点匹配; C1库存，C2库存等。

在旧的xcart数据库中，这曾经相对简单;

SELECT COUNT(`amount`)
FROM `xcart_order_details`
WHERE `productid` IN (
  SELECT `productid`
  FROM `xcart_products` WHERE `orderid` IN
    (SELECT `orderid`
     FROM `xcart_orders`
     WHERE `date` > ".$date_range."
       AND (`status` = 'P'
            OR `status` = 'Q'))
  AND (LOWER(param01) = 'c1 stock'
       OR LOWER(param01) = 'c2 stock'
       OR LOWER(param01) = 'g stock'
       OR LOWER(param01) = 'stock')
  AND `productid` = ".$safe_prodid.")

此查询有效。但现在我们的库存位置存储在另一个名为xcart_extra_field_values的表中，并且必须在fieldid = 5的情况下检索;

我尝试使用联接从xcart_extra_field_values获取其中fieldid = 5的值字段，并尝试执行我在上面的查询中执行的操作，但它不起作用。

SELECT COUNT(`a.amount`)
FROM xcart_order_details a,
     xcart_extra_field_values b
WHERE a.productid IN (
  SELECT productid
  FROM xcart_products WHERE orderid IN
    (SELECT orderid
     FROM xcart_orders
     WHERE date > 1409529600
       AND (status = 'P'
            OR status = 'Q'))
  AND (LOWER(b.value) = 'c1 stock'
       OR LOWER(b.value) = 'c2 stock'
       OR LOWER(b.value) = 'g stock'
       OR LOWER(b.value) = 'stock')
  AND (a.productid = b.productid)
  AND (a.productid = 4169)
  AND (b.fieldid = 5)

不幸的是，这个查询不起作用，我知道这是一个语法问题，但我得到的错误无济于事。

任何人都可以解释我做错了什么吗？

Answer 1

您缺少如何加入这两个表的条件。假设表xcart_extra_field_values中有一个xcart_order_details_id，然后使用它。

毕竟，你甚至不必加入。您需要xcart_order_details的结果，其中某些详细信息值记录为EXIST：

SELECT COUNT(`amount`)
FROM `xcart_order_details`
WHERE `productid` IN 
(
  SELECT `productid`
  FROM `xcart_products` 
  WHERE `orderid` IN
  (
    SELECT `orderid`
    FROM `xcart_orders`
    WHERE `date` > ".$date_range."
    AND `status` IN ('P','Q')
  )
AND `productid` = ".$safe_prodid."
AND EXISTS
(
  SELECT *
  FROM xcart_extra_field_values v
  WHERE v.xcart_order_details_id = xcart_order_details.id
  AND fieldid = 5
  AND LOWER(param01) IN ('c1 stock','c2 stock','g stock','stock')
);

顺便说一句：你算一下有多少订单明细记录？

Answer 2

解决。

SELECT COUNT(a.amount)
FROM xcart_order_details a,
     xcart_extra_field_values b
WHERE a.productid IN
    (SELECT productid
     FROM xcart_products
     WHERE orderid IN
         (SELECT orderid
          FROM xcart_orders
          WHERE date > 1409529600
            AND (status = 'P'
                 OR status = 'Q'))
       AND (LOWER(b.value) = 'c1 stock'
            OR LOWER(b.value) = 'c2 stock'
            OR LOWER(b.value) = 'g stock'
            OR LOWER(b.value) = 'stock'))
       AND (a.productid = b.productid)
       AND (a.productid = 4169)
       AND (b.fieldid = 5)

首先，我在查询结束时错过了一个括号，因为我正在嵌套两个IN查询，我需要在COUNT中删除a.amount周围的Grave重音，这是不喜欢的。当我并排查看我的查询时，我只注意到了缺失的括号。

编辑：在我的嵌套IN子句之外移动我的连接，因为它嵌套是没有意义的。

使用连接和嵌套查询计算数量

2 个答案: