讀取XML子節點屬性使用SQL查詢

Question

我有表（資格）一個XML列（標準），其中包含不同的XML：爲

<training ID="173"><badge ID="10027" /><badge ID="10028" /></training> 
<book Category="Hobbies And Interests" PropertyName="C#" CategoryID="44" /> 
<sport Category="Hobbies And Interests" PropertyName="Cricket" CategoryID="46" /> 
<education ID="450" School="Jai ambe vidyalaya"></education> 

我想讀的「徽章」節點「ID」屬性「訓練」節點下的所有節點。

任何人都可以幫忙嗎？的badge元素的任何地方badge元素中training只有

select t.c.value('.', 'int') ID 
from Qualifications q 
    cross apply q.Criteria.nodes('//training[badge]/badge[@ID]/@ID') t(c) 

的ID（不僅內部training）

Answer 1

標識

select t.c.value('.', 'int') ID 
from Qualifications q 
    cross apply q.Criteria.nodes('//badge[@ID]/@ID') t(c) 

如果Criteria列nvarchar類型，可以轉換爲xml爲：

select t.c.value('.', 'int') ID 
from Qualifications q 
    cross apply (select convert(xml, q.Criteria) xmlCriteria) a 
    cross apply a.xmlCriteria.nodes('//training[badge]/badge[@ID]/@ID') t(c) 

Answer 2

試試這個樣本，它應該幫助（只是你的表/列名替換@xml）

DECLARE @xml XML 
SET @xml =' 
<training ID="173"> 
    <badge ID="10027" /> 
    <badge ID="10028" /> 
</training> 
<book Category="Hobbies And Interests" PropertyName="C#" CategoryID="44" /> 
<sport Category="Hobbies And Interests" PropertyName="Cricket" CategoryID="46" /> 
<education ID="450" School="Jai ambe vidyalaya"></education>' 

SELECT data.col.value('(@ID)[1]', 'int') 
FROM @xml.nodes('(/training/badge)') AS data(col) 

輸出：

10027 
10028