Function alias 

pub fn alias<'a, V, E>(expr: E, name: &'a str) -> SQL<'a, V>
where
    V: SQLParam + 'a,
    E: ToSQL<'a, V>,

Create an aliased expression.

Example

use drizzle_core::expr::alias;

// SELECT users.first_name || users.last_name AS full_name
let full_name = alias(string_concat(users.first_name, users.last_name), "full_name");