Extracting SUM of data from XML in Sql

Question

I have an XML field in SQL table like this

<Root>
 <Name>Apollo</Name>
 <Code>1000</Code>
 <Code>2000</Code>
 <Code>3000</Code>
</Root>

I need to write an SQL query to select the 'Name' and SUM of 'Code' values

SELECT 
 T1.c.value('Name[1] AS VARCHAR(100)') AS Name,
 T1.c.value('Code[1] AS NUMERIC(10,5)') AS TotalCode
FROM TableName
CROSS APPLY xmlField.nodes('Root') AS T1(c)

it gives me output like this:

Name                Code
---------------------------
Apollo              1000
Apollo              2000
Apollo              3000

But I need SUM of values of all the Code tags like this:

Name                Code
---------------------------
Apollo              6000

Any ideas how to get sum of tag values?

Answer 1

This isn't the most "elegant" and I'm sure there is a more direct route, but you can try this

Select
    B.Name,
    SUM(B.TotalCode)
FROM 
(
    SELECT 
       T1.c.value('Name[1]', 'VARCHAR(100)') AS Name,
       T1.c.value('Code[1]', 'NUMERIC(10,5)') AS TotalCode
    FROM TableName
    CROSS APPLY xmlField.nodes('Root') AS T1(c)
) AS B
GROUP BY Name

Basically this first pulls the data out of the XML field items and then groups by Name and gives the sum. Like I said, not elegant but works!