我有一个类似于此结构的XML。
<Root>
<id>a2bh5</id>
<Student ID="123">
<Name>abc<Name>
<course>ETL<course>
<Scores>
<Score>
<Subject>SSIS<subject>
<grade>B<grade>
</score>
<Score>
<Subject>Informatica<subject>
<grade>C<grade>
</score>
</Scores>
</Student>
<Student ID="456">
<Name>xyz<Name>
<course>ETL<course>
<Scores>
<Score>
<Subject>Pentaho<subject>
<grade>F<grade>
</score>
<Score>
<Subject>Datastage<subject>
<grade>A<grade>
</score>
</Scores>
</Student>
</Root>
我想在SQL Server中使用Xquery从子节点(分数)及其父属性(Id)中获取详细信息。
对于所有主题,期望查询结果如下。请帮忙。
Student_Id subject grade
========================
123 SSIS B
清理好示例XML并正确关闭所有标签后,请尝试以下操作:
DECLARE @input XML = '<Root>
<id>a2bh5</id>
<Student ID="123">
<Name>abc</Name>
<course>ETL</course>
<Scores>
<Score>
<Subject>SSIS</Subject>
<grade>B</grade>
</Score>
<Score>
<Subject>Informatica</Subject>
<grade>C</grade>
</Score>
</Scores>
</Student>
<Student ID="456">
<Name>xyz</Name>
<course>ETL</course>
<Scores>
<Score>
<Subject>Pentaho</Subject>
<grade>F</grade>
</Score>
<Score>
<Subject>Datastage</Subject>
<grade>A</grade>
</Score>
</Scores>
</Student>
</Root>'
SELECT
StudentID = XStudents.value('@ID', 'int'),
Course = XStudents.value('(course)[1]', 'varchar(50)'),
Subject = XScore.value('(Subject)[1]', 'varchar(50)'),
Grade = XScore.value('(grade)[1]', 'varchar(10)')
FROM
@Input.nodes('/Root/Student') AS XT1(XStudents)
CROSS APPLY
XStudents.nodes('Scores/Score') AS XT2(XScore)
输出为:
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