FROM子句中的MS Access語法錯誤

Question

我有以下查詢，我不知道爲什麼我得到錯誤Syntax error in FROM clause。

SELECT * 
FROM t_object 
INNER JOIN 
(
    SELECT * 
    FROM t_objectproperties tag 
    WHERE tag.Property = 'Location' 
    AND tag.Value = 'Queens' 
) AS location 
    ON t_object.Object_ID = location.Object_ID 
INNER JOIN 
(
    SELECT * 
    FROM t_objectproperties tag 
    WHERE tag.Property = 'Room' 
    AND tag.Value = 'King' 
) AS type 
    ON t_object.Object_ID = type.Object_ID 

Answer 1

MS Access要求你用你的周圍多個括號聯接：

SELECT * 
FROM (t_object 
INNER JOIN 
(
    SELECT * 
    FROM t_objectproperties as tag 
    WHERE tag.Property = 'Location' 
    AND tag.Value = 'Queens' 
) AS location 
    ON t_object.Object_ID = location.Object_ID) 
INNER JOIN 
(
    SELECT * 
    FROM t_objectproperties as tag 
    WHERE tag.Property = 'Room' 
    AND tag.Value = 'King' 
) AS type 
    ON t_object.Object_ID = type.Object_ID 

這也可以寫成：

SELECT * 
FROM (t_object as o 
     INNER JOIN t_objectproperties as location 
     ON o.Object_ID = location.Object_ID) 
     INNER JOIN t_objectproperties as type 
     ON o.Object_ID = type.Object_ID 
WHERE location.Property = 'Location' 
    AND location.Value = 'Queens' 
    AND type.Property = 'Room' 
    AND type.Value = 'King'