exec failed because the name not a valid identifier?

Question

I have a query I need run it as a dynamic query to output a meaningful column name. As an example, if I run the query directly, it returns data correctly. However, if I use

Answer 1

As was in my case if your sql is generated by concatenating or uses converts then sql at execute need to be prefixed with letter N as below

e.g.

Exec N'Select bla..' 

the N defines string literal is unicode.