RowNum for header and detail for XMLNodes using XQuery Sqlserver

Question

Hi All,
I have this xml.
declare @xml xml
set @xml =' <StudentsData>
<StudentData>
<Name>AAA</Name>
<subjects>
<subject>
<Name>computers</Name>
<marks>30</marks>
</subject>
<subject>
<Name>Maths</Name>
<marks>40</marks>
</subject>
</subjects>
</StudentData>
<StudentData>
<Name>BBB</Name>
<subjects>
<subject>
<Name>Science</Name>
<marks>30</marks>
</subject>
<subject>
<Name>Physics</Name>
<marks>40</marks>
</subject>
</subjects>
</StudentData>
</StudentsData>'
I am able to get the proper data by querying like below.
select
s.n.value('(Name/text())[1]', 'varchar(50)') as StudentName ,
z.c.value('(Name/text())[1]','varchar(50)') as SubjectName ,
z.c.value('(marks/text())[1]','int') as Marks
from
@XML.nodes('/StudentsData/StudentData') as S(N)
CROSS APPLY s.n.nodes('subjects/subject') z(c)
But I want to include the header_id and detail_id to for these records using a variable like below.
eg: declare @header_id =100
      declare @detail_id = 1000
I want the output like below.
HeaderId DetailId StudentName SubjectName Marks
101 1001 AAA computers 30
101 1002 AAA Maths 40
102 1003 BBB Science 30
102 1004 BBB Physics 40
how do I get this using xquery.
Thanks in advance.

Answer 1

pls try
declare @xml xml
set @xml =' <StudentsData>
<StudentData>
<Name>AAA</Name>
<subjects>
<subject>
<Name>computers</Name>
<marks>30</marks>
</subject>
<subject>
<Name>Maths</Name>
<marks>40</marks>
</subject>
</subjects>
</StudentData>
<StudentData>
<Name>BBB</Name>
<subjects>
<subject>
<Name>Science</Name>
<marks>30</marks>
</subject>
<subject>
<Name>Physics</Name>
<marks>40</marks>
</subject>
</subjects>
</StudentData>
</StudentsData>'
declare @header_id int =100
declare @detail_id int= 1000
select @header_id+ROW_NUMBER() over(order by (select 1)) header_id,@detail_id+ROW_NUMBER() over(order by (select 1))detail_id,
s.n.value('(Name/text())[1]', 'varchar(50)') as StudentName ,
z.c.value('(Name/text())[1]','varchar(50)') as SubjectName ,
z.c.value('(marks/text())[1]','int') as Marks
from
@XML.nodes('/StudentsData/StudentData') as S(N)
CROSS APPLY s.n.nodes('subjects/subject') z(c)
vt
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