如何在SQL Server中求和XML节点值

Question

I want to sum xml node values, but luck is not favouring, please help.

select 
    animals_quantity.value('data(/AnimalsAddData/Quantity/@value)','int') 
from 
    tbl_animals

Answer 1

Take values from node and pass them to SUM aggregate:

DECLARE @xml xml = '
<AnimalsAddData>
    <Quantity value="4" />
    <Quantity value="1" />
    <Quantity value="10" />
    <Quantity value="200" />
</AnimalsAddData>'

SELECT SUM(N.value('.', 'int'))
FROM @xml.nodes('/AnimalsAddData/Quantity/@value') T(N)

Make sure you include sample data.

Answer 2

我找到了一个非常简单的解决方案。

SELECT  sum(CAST(CAST(CAST(animals_quantity AS XML) AS VARCHAR(100)) AS INT)) as total from tbl_animals