I'd split the SQL-Statement into different Common Table Expressions, where
you build the elements and aggregated XML information an join the result
together.
The following example (Multiple Orders with multiple Positions each)
includes 2 XMLAGGregates
With Positions as (Select Company, OrderNo,
XMLAgg(XMLElement(Name "OrderPos",
OrderPos,
XMLForest(ItemNo as "ItemNo",
OrderQty as
"OrderQty"))) XMLPos
From OrderDetx
Group By Company, OrderNo),
Orders as (Select XMLElement(Name "OrderNo", h.OrderNo, XMLPos)
XMLOrder
from OrderHdrX h join Positions p on h.company =
p.Company
and h.OrderNo =
p.OrderNo
where Deldate Between '2018-03-01' and '2018-03-31')
Select XMLElement(Name "Root", XMLAgg(XMLOrder))
from Orders;
Mit freundlichen Grüßen / Best regards
Birgitta Hauser
"Shoot for the moon, even if you miss, you'll land among the stars." (Les
Brown)
"If you think education is expensive, try ignorance." (Derek Bok)
"What is worse than training your staff and losing them? Not training them
and keeping them!"
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don't want to.? (Richard Branson)
-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxx> On Behalf Of Steve
Needles
Sent: Donnerstag, 22. März 2018 23:39
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: SQL XML Nested Aggregation
Hey all,
I've got to generate an XML that has nested Aggregation levels.
<Thing>
<Levels>
<Level>
<Stuff></Stuff>
<NextLevels>
<NextLevel></NextLevel>
<NextLevel></NextLevel>
</NextLevels >
</Level>
<Level>
<Stuff></Stuff>
<NextLevels>
<NextLevel></NextLevel>
<NextLevel></NextLevel>
</NextLevels >
</Level>
</Levels>
<Thing>
Something like below won't work because the syntax won't allow nested
XMLAGG().
SELECT
XMLELEMENT(name "Levels",
XMLELEMENT(name "Stuff",column1),
XMLAGG(LevelsXML
XMLELEMENT(name "NextLevels",
XMLAGG(NextLevelXML)
)
)
)
FROM LevelsXML
Join NextLevelXML using(key1, key2)
GROUP BY Key1, Key2;
Does anyone have an idea of how to pull this off?
Steve Needles
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