sum method

Future<double?> sum(
  1. String column
)

SUM aggregate

Implementation

Future<double?> sum(String column) async {
  final originalSelects = List<String>.from(_selects);
  _selects.clear();
  _selects.add('SUM($column) as sum_value');

  final result = await first();

  _selects.clear();
  _selects.addAll(originalSelects);

  return result?['sum_value']?.toDouble();
}