從sql中的多個xml行中獲取值（ms server 2005）

Question

我會盡可能清楚地解釋這種情況。我有下面的這個查詢，它試圖從與書相關的sql server 2005中的xml列中獲取author_id的列表，但將查詢分配給@authorIds會返回一個錯誤，因爲它返回多行，關於如何運行的任何想法這個問題？非常感謝你們。

DECLARE @BookAuthor TABLE (ID int) 
DECLARE @authorIds xml 
SET @authorIds = (select ListOfAuthors.query('/Authors/value') from BookRelated where ListOfAuthors is not null) 

INSERT INTO @BookAuthor (ID) SELECT ParamValues.ID.value('.','VARCHAR(20)') 
FROM @authorIds.nodes('/Authors/value') as ParamValues(ID) 

SELECT a.ID, 
    FullName AS Author 

FROM Author auth 
INNER JOIN @BookAuthor a 
ON  a.ID = auth.Id 

Answer 1

你就行了錯誤 「FROM @ authorIds.nodes（ '/作者/值'）作爲ParamValues（ID）」，它應該是「來自@ authorIds.nodes（ '值'）作爲ParamValues （ID）「

--- Test Data 
DECLARE @BookRelated TABLE (ListOfAuthors XML) 
DECLARE @Author TABLE (ID int, FullName VARCHAR(100)) 

INSERT INTO @BookRelated (ListOfAuthors) VALUES ('<Authors><value>1</value></Authors>') 
INSERT INTO @Author (ID, FullName) VALUES (1, 'Matt') 


-- test script 
DECLARE @BookAuthor TABLE (ID int) 
DECLARE @authorIds xml 

SET @authorIds = (
    select ListOfAuthors.query('/Authors/value') 
    from @BookRelated 
    where ListOfAuthors is not null) 

INSERT INTO @BookAuthor (ID) 
SELECT ParamValues.ID.value('.','VARCHAR(20)') 
FROM @authorIds.nodes('value') as ParamValues(ID) 

SELECT a.ID, FullName AS Author 
FROM @Author auth 
INNER JOIN @BookAuthor a ON a.ID = auth.Id