sum method

Future<double> sum(
  1. String column
)

Retrieve the sum of the values of a given column.

Implementation

Future<double> sum(String column) async {
  _setStatement(Operator.get);
  _setColumn(column);
  _setAggraegate(Aggregate.sum);
  _buildSql();
  var results = await db.select(_sql);
  return results[0]['SUM($column)'];
}