如何查詢多個數據庫訪問我的病情

Question

這是我的條件。

我有三個表與表Recpe，Recipe.ingID，Recipe.pID從產品的Product.pID（主鍵）引用下面的列

Recipe 
    - rID 
    - pID 
    - ingID 
    - ingAmount 

Product 
    -pID 
    -pName 

Ingredient 
    - ingID 
    - ingName 

，而同樣ingredient.ingID還引用來自Product.ingID。

一般來說，

Recipe.pID = Product.pID 
Recipe.ingID = Product.pID 
Recipe.ingID = Ingredient.ingID 

我想在ACCESS僅使用單個查詢檢索以下列。

pID | pName | ingID | ingName | ingAmount |

我嘗試以下：

SELECT Recipe.pID, Product.pName, Recipe.ingID, 
     Ingredient.ingName, Recipe.ingAmount 
    FROM Recipe, Product, Ingredient 
WHERE Recipe.pID = 5 
     AND (
      Recipe.ingID = Ingredient.ingID 
      OR Recipe.ingID = Product.pID 
      ); 

的問題是，部分(Recipe.ingID = Ingredient.ingID OR Recipe.ingID = Product.pID)獲取評估第一因此多行查詢。

如果你有我想問的問題，請幫助我。

Answer 1

SELECT Recipe.pID, Recipe.ingID, Recipe.ingAmount, 
     Ingredient.ingName AS element_name, 
     'Ingredient' AS element_type 
    FROM Recipe INNER JOIN Ingredient 
      ON Recipe.ingID = Ingredient.ingID 
WHERE Recipe.pID = 5 
UNION 
SELECT Recipe.pID, Recipe.ingID, Recipe.ingAmount, 
     Product.pName AS element_name, 
     'Product' AS element_type 
    FROM Recipe INNER JOIN Product 
      ON Recipe.pID = Product.pID 
WHERE Recipe.pID = 5 
UNION 
SELECT Recipe.pID, Recipe.ingID, Recipe.ingAmount, 
     Product.pName AS element_name, 
     'Product as Ingredient' AS element_type 
    FROM Recipe INNER JOIN Product 
      ON Recipe.ingID = Product.pID 
WHERE Recipe.pID = 5;