Greater than or euqal to / Less than or equal to (=) in Query class in AX 2012 or D365

Greater than or equal to:

queryBuildDataSource.addRange(fieldNum(HcmPosition
WorkerAssignment,ValidTo));
        queryBuildRange.value(SysQuery::range(today(), dateMax()));

or

queryBuildDataSource.addRange(fieldNum(HcmPosition
WorkerAssignment,ValidTo));
        queryBuildRange.value((queryRange(today(), dateMax()));

Less than or equal to:

 queryBuildDataSource.addRange(fieldNum(HcmPosition
WorkerAssignment,ValidTo));
        queryBuildRange.value(SysQuery::range( dateNull(), today()));

or

queryBuildDataSource.addRange(fieldNum(HcmPosition
WorkerAssignment,ValidTo));
        queryBuildRange.value((queryRange(dateNull(), today())); 

Regards,