SQL查詢沒有顯示出需要的結果

Question

我有一個SQL查詢，我要查詢三個表（其中一些兩次）和我沒有得到結果，我需要：

我需要「文章」的搜索一個搜索字符串（'網球'）和查找這些文章的第二張'orderdetails'。 命中顯示訂購了多少。

現在我需要檢查這些項目是否已經交付。 因此，我查看'orderdetails'的表'訂單'，並在同一個表中查找這些訂單是否有'delivery'。 '訂單'和'送貨'有一個字段，顯示它是什麼類型。

所以我必須檢查一個'交付'是否被一個'訂單'轉發。

接下來檢查這個'delivery'是否包含'article'並總結交付的文章。

如果交付物品的數量低於訂購物品的數量，我想顯示此記錄。

到目前爲止，它的工作原理除了這些項目： - [解決]感謝HLGEM「訂單」沒有「交貨」是不是在所有 顯示 - [解決]「訂單」與相同數量的「交貨」是顯示，但我不希望他們。

這是我到目前爲止有：

箴：流程訂單
珠三角：處理交貨
一個：ArticleItem
號碼：processOrderItem
d：deliveryItem

[更新代碼]

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) 

添加以下行解決了第二個問題：

HAVING Deliveryamount < Orderamount 

Answer 1

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) 

這將解決您的左連接問題。

Answer 2

我不知道這是什麼線在WHERE條件：

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

我不認爲textsearch功能在MySQL中存在，所以試試這個：

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) 

嘗試使用AND PrO.Forwarded like '%Delivery:%'代替AND TEXTSEARCH('Delivery:' IN PrO.Forwarded)

Answer 3

第一個問題是可能與這兩條線：

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

和

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

因爲左連接有效的具有NULL值，如果沒有發貨沒有辦法，珠三角。編號可以以'DE-'開頭。有可能是一個where子句，如：

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

可能解決您的問題的第一部分。不確定問題的第二部分。我無法弄清楚你在做數字比較。