{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

2.5.5-2.6.4 - Currently object oriented programming gain...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Currently object oriented programming gain significant attention. It appeared long time ago and was offering a natural modeling of the real world however, it was not so used because it required more resources. Now, as the computer resources are cheap, but the human resources are expensive, the object oriented paradigm is very used. It was also adopted in database modeling. There are 2 new systems developed: a pure object oriented DBMS (OODBMS) and an extension of the current relational databases named Object Relational DBMS (ORDBMS). In the object oriented paradigm we have objects, which represent entities from the real-world. They contain the data describing the object, the relationships between the object and other objects and the methods to process the objects. It is a self- contained structure, keeping everything and managing everything it need.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 For instance we have the following representation of an INVOICE. In the Entity Relationship model (ERM), from the right hand side of the picture, the invoice will be generated by a customer and will contain several line-items. Also it would have number, date, ship data and total cost.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern