is there dbgrid member hoop infinite datasets fast?

large datasets, millions records, need special programming say speed dbgrids.

i wish know there any processed components delphi (dbgrids) automatically?

edit example: databases have comforts such fetch 1st x annals (eg 100 records). i strech bottom scrolling, i wish automobile fetch unbroken 100. conversely i strech beginning, i wish fetch before 100. i know i way this, nonetheless certain illusory beget underline dbgrid control where dbgrid does buffering. save definitely bit programming - simply have set "buffer size" speak.