Sign Up Now
Get instant access to over 1 million+ study documents
OR
Already registered? click here to login
By creating your account, you agree to our terms of service, privacy policy and student honor code.
In mathematical terms, the difference between attribute and value-set is simply the differnce between the viable and the component within the variable. For instance, the attribute of a student can be his name. The letters of his name (the character bits) are in the set. Any combination of this characters string is in the domain / set, but actually the person / attribute himself cannot have all combinations of this domain for his name.
What is the difference between specialization and generalization? Why do we not display this difference in schema diagrams? Explain
Specialization refers to defining a set of subclasses of an entity type. The entity type itself is called the super class of the specialization. Each of these subclasses contains some particular characteristics of the superclass that singles them out. For example, the superclass 'Employee' may contain the set of subclasses {Secretary,...
Specializations may also addend characteristics so, for instance, to the above, we can add {Salaried-Employee, Hourly_Employee} which distinguished between the rate of pay of employees. Specialization allows us to define and particularize subclasses. Generalization, on the toehr hand, is the reverse process where differences are suppressed and all are lumped into a group. Schema diagrams only display some aspects of a schema, such as data items, certain types of constrains, and the names of record types therefore, differences between specialization and generalization cannot be included in schema diagrams.
What is the importance of requirements collection and analysis? What happens if this step is not carried out properly? Explain..
Interaction with potential users and user groups collects detailed requirements and analysis of these requirements. The importance of this
Leadership Having influence on a situation can often mean that the person is willing to let other people take the credit. Being humble enough to allow other members of a team to shine is a leadership trait that is difficult for some to cultivate, but can lead to superior results in the long run because morale and trust are developed in the group. Let's say a group is entrusted with the
US GovernmentThe Constitution of the United States establishes a federal government and defines its powers. The document also enumerates the powers that the federal government possesses. Additionally, the Constitution outlines several reserved powers, which are granted to the states. The enumerated powers are those specifically listed in Article I, Section 8 of the Constitution. These powers include the power to tax, to borrow money, to regulate interstate and foreign commerce,
Decision Ethical Implications Legal Implications Fairness Implications Volkswagen knowingly used the software in its emission systems for its diesel cars sold in the U.S. which suppressed the emission readings to suit the requirements of the regulators in 2014-15. The company used these reduced emission readings to market and sell the car not only in the U.S. bit also in other parts of the world including Europe. The company used these reduced emission readings
Loblaw Strategy in Wake of Wal-Mart Entry Comparison of Loblaw's strategy and performance with Wal-Mart. External and Internal analysis of Loblaw PESTEL Analysis for Loblaw Porter's Five Forces VRIO Frameworks Analysis Comparison of Loblaw's strategy and performance with Wal-Mart. Loblaw's was the largest supermarket in Canada with a market share of nearly 35% in 2005 and 609 corporate and 427 franchised stores throughout every province within the territory of Canada. It is also the number one seller
Conceptualizing a "Sustainability Business Model" Stubbs, W., & Cocklin, C. (2008). Conceptualizing a "Sustainability Business Model." Organization & Environment, 103-127. There are many new pressures in the modern global business environment that require firms to think about sustainability in new ways. The authors of this article believe to quell these pressures organizations will have to literally transform the paradigms that they are operating under. Furthermore, the authors believe that the dominant neoclassical
Symbol is an image that conveys an idea to the viewer. For instance, the Golden Arches symbol used by McDonald's conveys the idea of fast-food -- a burger and fries with a Coke to go, picked up at the drive-thru window. One little symbol puts in the mind an idea and can even put in the will a desire for something that was not there a moment ago. Symbols have