Function sqrt 

pub fn sqrt<'a, V, E>(
    expr: E,
) -> SQLExpr<'a, V, <V::DialectMarker as DialectTypes>::Double, <V::DialectMarker as DomainMathPolicy<E::Nullable>>::Nullable, E::Aggregate>
where
    V: SQLParam + 'a,
    V::DialectMarker: MathExt + DomainMathPolicy<E::Nullable>,
    E: Expr<'a, V>,
    E::SQLType: Numeric,

SQRT - returns the square root of a number.

Returns a dialect-aware double type. SQLite and MySQL return NULL for a negative argument, while PostgreSQL reports an error.

Example

use drizzle_core::expr::sqrt;

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