this question we have to Answer

we have to make a table and answer it properly as it has been asked

A car hire firm wants to introduce a computer system in order to keep track of its fleet of cars, its customers and details of car hirings. Each car belongs to a hire price band. A car remains in that price band for the duration of its life. The company would like to know which model of car is the most popular. Network Structure - Used in some mainframe DBMS packages - Many-to-many relationships Network Structure Department A Department B Employee Employee 2 Employee Project Project B Relational Structure Dloc Dmgr Etitle Department Table Deptno Dname Dept A Dept B Dept C Employee Table Empno Ename Emp 1 Emp 2 Emp3 Emp4 Emp 5 Emp 6 Esalary Deptno Dept A Dept A Dept B Dept B Dept C Dept B Most widely used structure Data elements are stored in tables - Row represents a record; column is a field - Can relate data in one file with data in another, if both files share a common data element Multidimensional Model Denver Los Angeles San Francisco West East February March Actual Budget Actual Budget Sales Camera TV VCR Audio Margin Camera TV VCR Audio Profit Total Expenses Margin COGS East West Sales Actual Budget Actual Budget TV January February March Qtr 1 VCR January February March Qtr 1 April Qtr 1 March April Qtr 1 March February February January Actual Budget Sales Margin Sales Margin January Sales TV VCR Margin TV VCR TV East East West South Total East West South Total Actual Budget Forecast Variance Actual Budget Forecast Variance VCR West Object-Oriented Structure . An object consists of - Data values describing the attributes of an entity - Operations that can be performed on the data Encapsulation - Combine data and operations Inheritance - New objects can be created by replicating some or all of the characteristics of parent objects