Essays on Cardinality

Business Rules and Data Models

A database is any collection of information that is organized in a particular way on order to make it possible to access and retrieve the information stored therein in a very efficient manner (Ramakrishnan and Gehrke, 1997). With efficient retrieval of information for use being the important cardinal essence of a database, there is need to arrange and organize the data in a manner that makes it fit to be easily retrieved. A system that helps in organizing a database through creation, update and other related activities on a database is known as a database management system (DBMS). Information ...

1. Draw an ERD for the Parrot Palace information system. 2. Indicate cardinality. The objective is to create an ERD that will help to represent the relationship between the birds and tricks. In order to accomplish this, it is important to use the associative entity that has the data about a specific bird and the specific trick. Since there are 50 birds and 20 tricks, the table will have hundreds of records. The key would be to use a combination of the number of birds and the number of tricks. The additional associative entity will also need to be ...

Entity relationship diagram is a visual database development tool which presents the relationship between the entities in a data base in a visual form. Entity relationship diagram plays a significant role in database system development since it outlines the structure of the database in a simple format. It shows the connection between the entities within the database, the attributes of each entity and the level of cardinality between the entities. It is a graphical representation of the relationship of entities and attributes in a database system. Entity relationship diagram can be used as a data modeling technique that aid ...

[The Course]

Quality of data is considered to be high in case its nature and structure fits for its presupposed usage in making decisions, performing different operations and planning future activities. Data can also be treated as of high-quality in case it adequately represents the real-world processes to which it is linked. Data quality also means that data storage corresponds to the principles of data consistency, validity, timeliness, accuracy and completeness. Following these principles allows to use the data in appropriate way (Redman 56). There are numerous advantages of high-quality data management. A major widely recognized benefit of improving ...

The monitoring of the Gigabit Passive Optical Networks (GPONs) is based on the optical coding (OC) technique and which is the most cost-effective monitoring technique. The performance of the OC technique relies on the design of the implemented hardware and on the design of the address code chosen. With an increasing number of GPON users, the address code selected must has the ability to support a number of code-words that are equal or larger than the available users. The main purpose for this research is to improve the GPON monitoring system using the OC technique. This research has developed ...

- Assume that you are an employee of consultancy company that specializes in the analysis design, and implementing of database systems. A client has recently approached your company with a view to implementing a database system but they are not familiar with the development. - Provide three examples of user views for a database systems for a car Insurance Company such as GIECO.

Examples of User views (External Schema)

Example 1 Get a Quote View: ----------------------

Enter ZIP code

Example 2 User info View --------

Residential Address

Indicate whether you are a new or a current customer Example 3 Vehicle Info View ------------

Make

Model Body Style Purchase ...

ENTITY RELATIONSHIP

In order to develop an entity relationship diagram, different aspects are put in place. To start with, we define the major business that needs to be automated. This forms the entities. Attributes are defined by the various storage fields and tables in the database. In the case of Celtic Analytics we are going to implement a data warehouse that bears the resemblance to a relational database system. The process will involve the translation of ideas into sophisticated plan that will permit the development team to put together a relational data warehouse schema in lieu of the key functionality of the warehouse. ...

Envisage a situation in which you are standing facing a delicate buffet overflowing with several delicacies. The objective is to try all of them out, however you must make a decision on what sequence and what substitute of flavors will make the most of the general delight of your appetite. Even though much less satisfying and prejudiced, these are the forms of difficulties that query optimizers are required to resolve. Provided a query, there are numerous schemes that a DBMS can pursue to process it and create its response. All plans are equal in the basis of their ultimate output however they differ in ...