XQuery SQL XML values - sql

Question

We have to find a query parsing XML to have a result like this one:
COL_ACTION N COL_NAME_I COL_VALUE_AFTER
---------- ----------- ---------------- -------------------
INS 1 N 1
INS 1 TST_ID 28
INS 1 TST_DATA data2
INS 2 N 2
INS 2 TST_ID 27
INS 2 TST_DATA data1
The value of column N depend on the value of the first "row" (COL_NAME_I = N) of the XML dataset
The XML contains:
DECLARE #XML XML =
N'
<DATASET>
<XML_INS>
<IROW xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<N>1</N>
<TST_ID>28</TST_ID>
<TST_DATA>data2</TST_DATA>
</IROW>
<IROW xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<N>2</N>
<TST_ID>27</TST_ID>
<TST_DATA>data1</TST_DATA>
</IROW>
</XML_INS>
</DATASET>
';
The query I was able to do is:
SELECT RIGHT(ca.value('local-name(.)','CHAR(7)'), 3) AS COL_ACTION,
x.value('(//N)[1]', 'int') AS N,
-- cn.value('./text()[1]','int') AS NI,
ci.value('local-name(.)','sysname') AS COL_NAME_I,
ci.value('./text()[1]','nvarchar(max)') AS COL_VALUE_AFTER
FROM #XML.nodes('.') AS T(x)
OUTER APPLY #XML.nodes('DATASET/*') AS TA(ca)
OUTER APPLY #XML.nodes('DATASET/XML_INS/IROW/N/*') AS TN(cn)
OUTER APPLY #XML.nodes('DATASET/XML_INS/IROW/*') AS TI(ci);
The problem remains on the "N" column that does no have the expected value:
COL_ACTION N COL_NAME_I COL_VALUE_AFTER
---------- ----------- ---------------- -------------------
INS 1 N 1
INS 1 TST_ID 28
INS 1 TST_DATA data2
INS 1 N 2
INS 1 TST_ID 27
INS 1 TST_DATA data1
I tryed different approach, as seen in SQL comment, but does not produce the good result...

Answer 1

You need each .nodes to refer to the previous, in order to only bring back its children. Otherwise you get every descendant node for the whole document.
SELECT RIGHT(action.value('local-name(.)','CHAR(7)'), 3) AS COL_ACTION,
irow.value('(N/text())[1]', 'int') AS N,
ci.value('local-name(.)','sysname') AS COL_NAME_I,
ci.value('text()[1]','nvarchar(max)') AS COL_VALUE_AFTER
FROM #XML.nodes('DATASET/*') AS x1(action)
OUTER APPLY x1.action.nodes('IROW') AS x2(irow)
OUTER APPLY x2.irow.nodes('*') AS TI(ci);
db<>fiddle

Answer 2

This should do it:
SELECT
irow.value('local-name(..)', 'NVARCHAR(100)') AS COL_ACTION,
irow.value('(./N)[1]', 'NVARCHAR(100)') AS N,
child.value('local-name(.)', 'NVARCHAR(100)') AS COL_NAME_I,
child.value('.', 'NVARCHAR(100)') AS COL_VALUE_AFTER
FROM #XML.nodes('/DATASET/*/IROW') AS n1(irow)
CROSS APPLY irow.nodes('./*') AS n2(child)

Answer 3

i am a new contributer so sorry if i got something wrong.
I used this approach on my work : Link
My sample working code :
CREATE TABLE #FieldPermissionsTable
(
TE_ID VARCHAR(MAX),
Value VARCHAR(MAX),
Value2 VARCHAR(MAX),
NAVI_USER VARCHAR(MAX)
)
--SET #FieldPermissionAccessXML = '<Row_ID><Elements ID="1" Value="1" Value2="NULLnROLLA" Navi_User="testuser" /><Elements ID="3" Value="tespit" Value2="NULLnROLLA" Navi_User="testuser" /><Elements ID="6" Value="aciklama" Value2="NULLnROLLA" Navi_User="testuser" /></Row_ID>'
-- SELECT #FieldPermissionAccessXML = [dbo].[to_xml_replace] (#FieldPermissionAccessXML)
EXEC sp_xml_preparedocument #XmlHandle output,#FieldPermissionAccessXML
--'<FieldPermissions>
--<FieldPermission FieldName="" RoleID="1" Access="1" />
--<FieldPermission FieldName="" RoleID="2" Access="1" />'
--select * from JMP_FieldPermissions
INSERT INTO #FieldPermissionsTable
SELECT *--ID,Value, Value2, Navi_User
FROM OPENXML (#XmlHandle, './Row_ID/Elements')
WITH (TE_ID VARCHAR(MAX) '#ID',
Value VARCHAR(MAX) '#Value',
Value2 VARCHAR(MAX) '#Value2',
NAVI_USER VARCHAR(MAX) '#Navi_User'
)