Question

我会尽可能清楚地解释这种情况。我在下面有这个查询，试图从sql server 2005中的一个xml列中获取一个author_ids列表，但是将该查询分配给@authorIds会返回一个错误，因为它会返回多行，有关如何运行的任何想法这个问题？非常感谢你们。

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

您在“FROM @ authorIds.nodes（'/ Authors / value'）”行中有一个错误，因为ParamValues（ID）“它应该是”FROM @ authorIds.nodes（'value'）为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

从sql中的多个xml行中抓取值（ms server 2005）

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