varoldData=_connection.QueryFirstOrDefault(" SELECT * FROM dc_base_sku_fba_mapping WHERE bailun_sku = @bailun_sku AND warehouse_code = @warehouse_code; ",parameters);
varoldData=_connection.QuerySingleOrDefault<dc_base_sku_fba_mapping>(" SELECT * FROM dc_base_sku_fba_mapping WHERE bailun_sku = @bailun_sku AND warehouse_code = @warehouse_code; ",parameters);