XQUERY - How to use the sql:variable in 'value()' function?

Question

The query below is trying to select a child node of a given Node. How do I use a variable instead of hard coding the child node such that I can pass them as parameters in a

Answer 1

declare @T table(XMLCol xml)
insert into @T values
('
  
    No this
    John
    
      
        GMT Standard Time
        GMT
      
    
  
') 

declare @Node1 varchar(50)
set @Node1 = 'TimeZone'

declare @Node2 varchar(50)
set @Node2 = 'DisplayName'

select N2.Value.value('.', 'varchar(100)') as Value 
from @T as T
  cross apply (select T.XMLCol.query('//*[local-name()=sql:variable("@Node1")]')) as N1(Value) 
  cross apply (select N1.Value.query('//*[local-name()=sql:variable("@Node2")]')) as N2(Value)