FROM子句中的MS Access语法错误 [英] MS Access syntax error in FROM clause
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问题描述
我有以下查询,我不知道为什么收到错误Syntax error in FROM clause
.
I have the following query and I have no idea why I am getting the error 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
推荐答案
MS Access要求您在多个联接周围使用括号:
MS Access requires that you use parentheses around your multiple joins:
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
这也可以改写为:
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'
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