pub fn sum<ST: Foldable, expr>(
expr: expr
) -> sum<ST, <expr as AsExpression<ST>>::Expression>where
expr: AsExpression<ST>,
Expand description
Represents a SQL SUM
function. This function can only take types which are
Foldable.
Examples
assert_eq!(Ok(Some(12i64)), animals.select(sum(legs)).first(connection));