/// <summary>
/// aggregate function query
/// </summary>
/// <typeparam name="DT">data type</typeparam>
/// <param name="query">query object</param>
/// <returns>data</returns>
async Task <DT> AggregateFunctionAsync <DT>(OperateType funcType, IQuery query)
{
ICommand cmd = RdbCommand.CreateNewCommand <T>(funcType);
SetCommand(cmd, null);
cmd.Query = query;
DT obj = await WorkFactory.AggregateValueAsync <DT>(cmd).ConfigureAwait(false);
return(obj);
}
