Need to fetch both Columns in XML Nodes? - sql

Question

Is it possible to get the 'A' and 'B' Columns in the Same(Single) SELECT Statement instead of using the 2 SELECT Statements:
Tried query:
DECLARE #Invoice_Types VARCHAR(MAX)='T-E,T-I,3-E,D-E,D-I'
,#Invoice_TypesXML XML
SET #Invoice_TypesXML=CAST(('<I>'+REPLACE(REPLACE(#Invoice_Types,',','</R><I>'),'-' ,'</I><R>') +'</R>')
AS XML);
SELECT I.value('.', 'VARCHAR(MAX)') A
FROM #Invoice_TypesXML.nodes('I') AS FN(I)
SELECT R.value('.', 'VARCHAR(MAX)') B
FROM #Invoice_TypesXML.nodes('R') AS FN(R)
Expected Result: in Single Select Statement
A B
-----------------
T E
T I
3 E
D E
D I

Answer 1

For your requirement, you need to revise your XML structure like this:
<Item>
<I>T</I><R>E</R>
</Item>
<Item>
<I>T</I><R>I</R>
</Item>
<Item>
<I>3</I><R>E</R>
</Item>
<Item>
<I>D</I><R>E</R>
</Item>
<Item>
<I>D</I><R>I</R>
</Item>
And then you can select your final result in one select statement.
Try this:
DECLARE #Invoice_Types VARCHAR(MAX)='T-E,T-I,3-E,D-E,D-I'
,#Invoice_TypesXML XML
SET #Invoice_TypesXML=CAST(('<Item><I>'+REPLACE(REPLACE(#Invoice_Types,',','</R></Item><Item><I>'),'-' ,'</I><R>') +'</R></Item>')
AS XML);
SELECT
x.Rec.query('./I').value('.', 'nvarchar(2000)') AS 'A',
x.Rec.query('./R').value('.', 'nvarchar(2000)') AS 'B'
FROM #Invoice_TypesXML.nodes('/Item') as x(Rec)
Final result:
A B
_____
T E
T I
3 E
D E
D I
See this Fiddle

Answer 2

One solution is :
SELECT I.value('(I[1])', 'VARCHAR(MAX)') A, I.value('(R[1])', 'VARCHAR(MAX)') B
FROM #Invoice_TypesXML.nodes('.') AS FN(I)
UNION ALL
SELECT I.value('(I[2])', 'VARCHAR(MAX)') A, I.value('(R[2])', 'VARCHAR(MAX)') B
FROM #Invoice_TypesXML.nodes('.') AS FN(I)
UNION ALL
...
More generically :
WITH
TI AS
(
SELECT I.value('(.)', 'VARCHAR(MAX)') I, row_number() over(order by I) AS N
FROM #Invoice_TypesXML.nodes('I') AS FN(I)
),
TR AS
(
SELECT I.value('(.)', 'VARCHAR(MAX)') R, row_number() over(order by I) AS N
FROM #Invoice_TypesXML.nodes('R') AS FN(I)
)
SELECT I, R
FROM TI JOIN TR ON TI.N = TR.N