Question

我有一个SQL查询，我必须查询三个表（其中一些表两次），但我得不到我需要的结果：

我需要在'文章'中搜索搜索字符串（'网球'），并为这些文章查找第二个表'orderdetails'。点击量显示了订购量。

现在我需要检查这些物品是否已经送达。因此，我查看'orderdetails'的表'订单'，如果这些订单有'交付'，请查看同一个表。 'orders'adn'delivery'有一个显示它是什么类型的字段。

因此，我必须检查“交付”是否由“订单”转发。

接下来检查这个“交付”是否包含“文章”并总结交付的文章。

如果交付的文章数量低于我想要显示此记录的订购文章数量。

到目前为止，除了这些项目之外它还有效： - [已解决]感谢HLGEM'订单'没有'交付'根本没有显示 - [已解决]显示与“交付”金额相同的“订单”，但我不希望他们这样做。

这是我到目前为止所做的：

PrO：流程订单
PrD：流程交付
a：ArticleItem
p：processOrderItem
d：deliveryItem

[更新了代码]

SELECT 
    a.Articlenumber AS Article,
    PrO.Number AS Order, 
    PrD.Number AS Delivery,
    p.Amount AS Orderamount,
    SUM(d.Amount) AS Deliveryamount,
    (p.Amount - Deliveryamount) AS OpenAmount

FROM Article AS a
    INNER JOIN ProcessesDetails AS p
    ON  (a.ArticleNumber = p.Article)
        AND LEFT(p.Order, 3) = 'OR-'
    INNER JOIN Processes as PrO
    ON  PrO.Number = p.Order
        AND TEXTSEARCH('Delivery:' IN PrO.Forwarded)
    LEFT JOIN Processes as PrD
    ON  PrO.Nummer = PrD.ForwardedFrom
        AND LEFT(PrD.Number,3) = 'DE-' 
    INNER JOIN ProcessesDetails as d
    ON  PrD.Number = d.Order
        AND d.Article = p.Article
WHERE (a.Categorie = 'tennis') 
GROUP BY(Article)

添加以下行解决了第二个问题：

HAVING Deliveryamount < Orderamount

Answer 1

我不知道where where条件中的这一行是什么：

AND TEXTSEARCH('Delivery:' IN PrO.Forwarded)

我不认为mysql中存在textsearch函数，所以试试这个：

 SELECT 
        a.Articlenumber AS Article,        
        PrO.Number AS Order, 
        PrD.Number AS Delivery,    
        p.Amount AS Orderamount,    
        SUM(d.Amount) AS Deliveryamount,    
        (p.Amount - Deliveryamount) AS OpenAmount    
    FROM Article AS a    
        INNER JOIN ProcessesDetails AS p ON (a.ArticleNumber = p.Article)   
        INNER JOIN Processes as PrO ON PrO.Number = p.Order
        LEFT JOIN Processes as PrD ON PrO.Nummer = PrD.ForwardedFrom    
        INNER JOIN ProcessesDetails as d ON PrD.Number = d.Order
    WHERE (a.Categorie = 'tennis') 
    AND LEFT(p.Order, 3) = 'OR-'
    AND PrO.Forwarded like '%Delivery:%'
    AND LEFT(PrD.Number,3) = 'DE-' 
    AND d.Article = p.Article
    GROUP BY(Article)

尝试使用AND PrO.Forwarded like '%Delivery:%'代替AND TEXTSEARCH('Delivery:' IN PrO.Forwarded)

Answer 2

SELECT 
    a.Articlenumber AS Article,        
    PrO.Number AS Order, 
    PrD.Number AS Delivery,    
    p.Amount AS Orderamount,    
    SUM(d.Amount) AS Deliveryamount,    
    (p.Amount - Deliveryamount) AS OpenAmount    
FROM Article AS a    
    INNER JOIN ProcessesDetails AS p ON (a.ArticleNumber = p.Article)   
    INNER JOIN Processes as PrO ON PrO.Number = p.Order
    LEFT JOIN Processes as PrD ON PrO.Nummer = PrD.ForwardedFrom AND LEFT(PrD.Number,3) = 'DE-'
    INNER JOIN ProcessesDetails as d ON PrD.Number = d.Order
WHERE (a.Categorie = 'tennis') 
AND LEFT(p.Order, 3) = 'OR-'
AND TEXTSEARCH('Delivery:' IN PrO.Forwarded)AND d.Article = p.Article
GROUP BY(Article)

这将解决您的左连接问题。

Answer 3

第一个问题可能与这两行有关：

LEFT JOIN Processes as PrD ON PrO.Nummer = PrD.ForwardedFrom

和

AND LEFT(PrD.Number,3) = 'DE-'

因为如果没有传递，左连接实际上具有NULL值，则PrD.Number无法以'DE-'开头。 where子句可能是：

AND (PrD.Number is null OR LEFT(PrD.Number,3) = 'DE-')

可以解决问题的第一部分。不确定问题的第二部分。我无法弄清楚你在做数字比较的地方。

SQL查询不显示所需的结果

3 个答案: