Entity-Relationship (E/R) Model Dr P Sreenivasa Kumar Professor CS&E Dept I I T Madras Entity-Relationship (E/R) Model Widely used conceptual level data model • proposed by Peter P Chen in 1970s Data model to describe the database system at the requirements collection stage • high level description. • easy to understand for the enterprise managers. • rigorous enough to be used for system building. Concepts available in the model • entities and attributes of entities. • relationships between
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Relationship Diagram #2. a. & b. One Room can be designated only one Room Type‚ whilst a particular Room Type can be assigned to several rooms (i.e. there may be many rooms that have double beds). Therefore‚ Room has a one-to-one relationship with RoomType and RoomType has a one-to-many relationship with Room. From the table‚ it can be seen that a particular room can only be designated as belonging to one type / category‚ thus confirming that Room RoomType has a one-one relationship
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Henry James’ The Turn of the Screw is arguably one of the most haunting ghost stories of all time. Still to this day‚ it leaves critics debating and there is not a clear consensus about what is true. It appears that only James himself knows the answer. The writing techniques and ambiguity through the use of characters and their relationships leave the reader questioning everything. Only the small fragments of truths‚ amidst daunting realisations‚ invalid coincidences and veiled madness; where is
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The Green Mile‚ which was based off a novel written by Stephen King‚ is a film directed by Frank Darabont that focuses on racism and the stereotypical behaviors of an African American man. The film’s setting is during the Great Depression; therefore‚ during this time in America the topics of race started to cause a conflict between Caucasian and African American men throughout the movie. In this paper‚ I decided to focus on the different types of symbolisms‚ racism‚ discrimination‚ and accusations
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began to publish works with sentimental plots. Generally the sentimental plot is written to make the reader feel an excess of unnecessary emotions‚ by overemphasizing every work. In every sentimental plot there will always be the typical sentimental hereon that fits the stereotype of a young orphan‚ unmarried women with moral obstacles. In this plot there are only two types of women the ones that are considered good and the ones that are bad. In the sentimental plot the good will get rewarded by marrying
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Light Period 2 “Comparing the Coolant Effects of Dry Ice and Ice” What we learned in this lab is how to compare the abilities of dry ice and solid water to act as heat absorbers. This mean that we had to compare which substance had the better result of absorbing more heat. We also learned to determine which substance was the most cost effective. We also learned how to determine the amount of heat each substance absorbed and compare which one absorbed the most heat. The first thing we did was heat
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Chasing Ice is a documentary that was released in November 16‚ 2012. Chasing Ice’s filmmaker is Jeff Orlowski. This documentary is about ice and how over the years us humans have been affecting the glaciers because of the climate change. It is conveying its message to the viewers because the climate and the down side to its change. Humanity has a big impact on the polar ice caps because we are causing global warming. Throughout the documentary the director has been giving us information over the
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In the early 1990s the ice cream industry was state regulated. It had artificial market‚ where all production was sold despite huge overproduction in the industry. During transition from state governed to market economy‚ the industry shrank rapidly and was unattractive mainly because of political and financial turmoil. Once Russian economy reemerged from the crisis‚ in the late 2001‚ the industry stabilized. Industry forces started to play major part in its attractiveness and macro factors did not
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to individuals‚ we cannot guarantee your success or income level. We are not responsible for your actions. Many factors will be important in determining your actual results and no guarantees are made that you will achieve similar results to the ones claimed in this e-book. No guarantees are made that you will achieve any results from the ideas and techniques in this material. We attempt to provide accurate‚ complete and timely information. However‚ we cannot guarantee the quality‚ content
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invitation to the fabulous ball and Mathilde reacts by having a fit. Now we have a specific problem: Mathilde’s now has the best opportunity she’s ever had to have a taste of the high life‚ but she has nothing to wear. That problem sets the rest of the plot in motion. Complication Diamonds are this girl’s best friend Mathilde solves the first problem when her husband gives her money for a dress. But then she runs into a second problem: she’s needs to have some jewels. Luckily‚ her friend Mme. Forestier
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