使用子查询连接内连接不支持的表达式

Question

在Access 2003中，我得到了一个“不支持连接表达式”的例外：

SELECT ID FROM Recipes INNER JOIN 
   (SELECT RecID, COUNT(RecID) AS NumIngredients 
    FROM Ingredients GROUP BY RecID) 
ON RecID = ID

我有两张桌子，食谱和配料。 Recipes.ID对应于外键Ingredients.RecID。我想获得与食谱中每行对应的成分中的行数。建议？

Answer 1

尝试不加入子查询：

SELECT 
  r.ID AS RecID,
  COUNT(i.ID) AS NumIngredients
FROM 
  Recipes r
  INNER JOIN Ingredients i ON i.RecID = r.ID
GROUP BY
  r.ID

这有用吗？

Answer 2

SELECT R.ID, COUNT(I.ID) AS CountOfIngredientRecords
FROM Recipes R INNER JOIN Ingredients I
ON R.ID = I.RecID
GROUP BY R.ID