avg method

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

AVG aggregate

Implementation

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

  final result = await first();

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

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