Iinkqubo zolawulo lwedatha ehambelana nolwalamano esekwe kwi-SQL zilungele kuphela imeko yokuphakama okanye imibuzo ephindaphindayo. Ezinye iinkqubo ezinje ngeArangoDB zingcono apha (bekukho intetho entle malunga noku kwiGOTO 2016 ). Kodwa unokuvelisa imibuzo ephindayo kwi-SQL ngoncedo lweentetho eziqhelekileyo zetafile kwaye ke ubuze umbuzo kwiitafile zomzali / zomntwana zakuzo zonke izinyanya kunye nenzala.
KwiPostgreSQL kujongeka njengoku, umzekelo:
0672c4761d202a35a9059fa137ace7c3
Ukuba ufuna ukufumana bonke abantwana bento ethile_id, usebenzisa iZichazi eTafileni eliqhelekileyo:
0672c4761d202a35a9059fa137ace7c3
Ukumisa abazali akukho ngxaki:
0672c4761d202a35a9059fa137ace7c3