Database Models :: essays research papers

In this subject I will be discussing the differences and similarities of the terzetto database good examples we have talked about in class the Entity-Relationship, intention place, and the UML modeling. First lets look at the definition of the third models. The Entity- Relationship Model is used to visually guard data objects and is used for database design. It is easy to understand which makes it easier to communicate the design to the quit user. The form used in the ER model can good be transformed into relational tables. (Information Technology Services ITS, 2004)Another database model we went over in class is the determination Model. There are three apprehensions to understanding the Object Models one of them being the Data Abstraction which is the lick of condensing data down to its essentials. Another one is the Inheritance in the object model is the means of defining one class in terms of another. The third concept in the object model is the Encapsulation which is the concept of including processing or behavior with the object instances defined by the class. Encapsulation allows inscribe and data to be packaged together. The third database model would be the UML model that stands for Unified Modeling Language used for writing software program muddied prints. The UML can be used to foresee, specify, construct, and document the artifacts of a software-intensive system. (Safari Tech Books Online, 2002, chap. 2) well-nigh of the similarities in the database model are that all three can be used in the database design process in some way. In our previous class DBM 380 we used the ER model for our projects even from our foregoing projects we can create the database model in an Object or UML model. Of the three database models I find that the Entity Relationship model was the easiest to create and explain to an decease user it also transforms effortlessly into relationship tables which worked well in Access. The Object model and UML model seem to be more of a delivery model than the ER model seems to be more for just databases although the Object model addresses both programming and databases. The UML model is more for intense software programming such as Java programming it would allow you to visualize and document your programming steps before starting the code.