Macro query

macro_rules! query {
    ($select:expr) => { ... };
    ($select:expr $(,$subquery:expr)+) => { ... };
}

Accepts a SELECT FROM format string and optional subqueries. If subqueries are provided, there should be curly braces {} in the format string to interpolate each subquery’s sql string into. Concatenates subqueries to the SELECT FROM clause, and creates a new RawQuery from the concatenated sql string. The binds from each subquery are added in the order they appear in the macro parameter. Subqueries are consumed into the new RawQuery.