Pass NVARCHAR (or Other String-type) Var As A Column Or Table Name In SQL

Hey folks, the question is fairly simple, unfortunately the answer has proven rather elusive.

Is it possible to declare a variable which would then be used to identify either a column or table in an SQL statement?

Here's a basic idea of what I'd like to do:

DECLARE @myVar AS NVARCHAR(50)

SELECT *
FROM @myVar

or

DECLARE @myVar AS NVARCHAR(50)

SELECT @myVar
FROM MyTable



I'm probably looking for some sort of built in function that will accept an argument here... like COLUMN(@myVar) or something of the like. I just don't know where to look...