A model is likewise said as Relational Database Model,

 A model is likewise said as Relational Database Model, on the off chance  mobile database that it observes total arrangement of Rules characterized by Dr. E.F. Codd. There are 12 Rules of Dr. Codd. In every one of them, just Oracle should follow almost every one of them. Be that as it may, the best in execution is Sybase which is more simpler to arrange that of Oracle.