Siyini isimiso sedatha?
Isikimu sedatha yincazelo yokuthi idatha ingahlelwa kanjani ngaphakathi kwedatha yolwazi. I-database yolwazi ingabuye ibe nezinhlelo eziningi. Ama-schema angachaza futhi uhlelo lomthombo idatha kuleyo schema ivela kulo. Isikimu sihlanganisa amagama amatafula, izinkambu, izinhlobo zedatha, nobuhlobo phakathi kwazo zonke lezi zinto. Ama-schema amelelwa ngokubonakalayo kusetshenziswa ama-Entity Relationship Diagrams (ERDs), futhi inqubo yokudala izincazelo ze-schema ibizwa ngokuthi ukumodeliswa kwedatha.