SQL server XML Parsing to Table - sql

Question

I am new to SQL xml operations. I have a problem with SQL & XML Parsing.
I have a Table named Task. It has 3 columns:
Name
Task
Date
Task is saving in Hours worked as an xml in the following format:
<TASK>
<A>1</A>
<B>4</B>
<C>0</C>
</TASK>
My table will look like this (with multiple employees)
Name | Task | Date
========================================================================
Employee2219 | <TASK><A>1</A><B>4</B><C>0</C></ TASK > | 2014-01-28
Employee2219 | <TASK><A>3</A><B>2</B><C>1</C></ TASK > | 2014-01-29
....
I need to calculate the hours spend per employee for each task in a week like:
Name | A | B | C | D
===============================
Employee2219 | 4 | 6 | 1 | 0
....
I am new to XML and I could not work this out.

Answer 1

It is straightforward to extract the xml using XQuery:
SELECT
Name,
SUM(TaskA) AS ATotal,
SUM(TaskB) AS BTotal,
SUM(TaskC) AS CTotal,
SUM(TaskD) AS DTotal
FROM
(
SELECT
t.NAME,
t.Date,
Nodes.node.value('(A)[1]', 'int') AS TaskA,
Nodes.node.value('(B)[1]', 'int') AS TaskB,
Nodes.node.value('(C)[1]', 'int') AS TaskC,
Nodes.node.value('(D)[1]', 'int') AS TaskD
FROM
TASK t
cross apply t.Task.nodes('/TASK') as Nodes(node)
) x
WHERE
[Date] BETWEEN '2014-01-01' AND '2014-01-07' -- Your week range
GROUP BY
Name;
SqlFiddle here
Please post your question in text - many corporate SO users are blocked from sites like imgur, so answering becomes guess work.