Function sqrt 

pub fn sqrt<'a, V, E>(expr: E) -> SQLExpr<'a, V, Double, E::Nullable, Scalar>
where
    V: SQLParam + 'a,
    E: Expr<'a, V>,
    E::SQLType: Numeric,

SQRT - returns the square root of a number.

Returns Double type, preserves nullability.

Example

use drizzle_core::expr::sqrt;

// SELECT SQRT(users.area)
let root = sqrt(users.area);