How to set default value for a variable in a parameter list

I want the variable to take a default value when a value not passed to开发者_如何学Python a Table valued function.

Could any one please help me do this.

A table valued function with default value for a parameter.

create function GetValue(@Value int = 1) 
returns table as return 
(
  select @Value as ID
)

Use it like this

select *
from dbo.GetValue(default)