Query query = new Query(); QueryBuildDataSource qbds1; ; qbds1 = query.AddDataSource(tablenum(Table)); qbds1.ordermode(ordermode::groupby); qbds1.addSortField(fieldnum(Table, a)); qbds1.addSelectionField(fieldnum(Table, b), selectionField::Sum); info(query.dataSourceNo(1).toString());