How to read XML structure in SQL Server

DECLARE @xml XML
SET @xml = (SELECT id, fname, lname FROM customers WHERE id in (161,162) FOR XML PATH('customers'))

SELECT
x.d.value('id[1]','INT') AS id,
x.d.value('fname[1]','VARCHAR(50)') AS fname,
x.d.value('lname[1]','VARCHAR(50)') AS lname
FROM @xml.nodes('/customers') x(d)