Customer and the Retailer have an account in the same bank. 2. Instead of the grid through which all the banks are connected the payment is processed by the bank for simplicity. E-R Diagram Tables and Primary Keys Normalization Forms The three normalization forms are 1. First normal form 2. Second normal form 3. Third normal form First normal form First normal form states that there should be no repeating elements or groups of elements in any table of database. As
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RESIDES (PERSON_NAME‚ STREET‚ CITY‚ STATE)WORKS (PERSON_NAME‚ COMPANY_NAME‚ SALARY)ADDRESS (COMPANY_NAME‚ CITY‚ STATE‚ ZIP)MANAGES (PERSON_NAME‚ MANAGER_NAME) 3. Find all employees who live in the same city and street as their manager (3 pts) SELECT R.PERSON_NAME‚ M.MANAGER_NAME‚ R.STREET‚ R.CITY‚ R2.STREET‚ R2.CITY FROM RESIDES R‚ MANAGES M‚ RESIDES R2 WHERE R.PERSON_NAME = M.PERSON_NAME AND M.MANAGER_NAME = R2.PERSON_NAME AND R.STREET = R2.STREET AND R.CITY = R2.CITY 4. Find all persons who do
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Chapter one 1.0 Introduction Database system developed because of the need to store large amount of data and retrieve that data quickly and accurately for example‚ a University abrary stores details about the books held and loans taken out by student. Not very long ago this information about the books and loads might have been stored in a box card index‚ nowadays‚ only a few decades later‚ student are able to view their loans online and see if a book is available and reserve it. The abrary staff
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During class time. Preview • • • • • • Normalization Solution: Normal Forms Introducing 3NF and BCNF 3NF Examples BCNF Normalization • Normalization is the process of efficiently organizing data in a database with two goals in mind • First goal: eliminate redundant data – for example‚ storing the same data in more than one table • Second Goal: ensure data dependencies make sense – for example‚ only storing related data in a table Benefits of Normalization • • • • • • Less storage space Quicker
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NOTE: IN UNIT – 2 NOT INCLUDE E-R DIAGRAM QUESTION. By: Nilay M Shah – KPP-MCA Department Page 1 Subject Code: 2620003 Subject: Database Management System UNIT – 3 22. What is Normalization? Why we need normalization in database? Explain Pros and Cons of Normalization. 23. Explain different Normalization Forms Rules. 24. What is Functional Dependency? What is use of Functional Dependency? Explain with Example. 25. Explain with Example: 1) Full Functional Dependency 2) Partial Functional
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Draw ENTITY RELATIONSHIP DIAGRAM (ERD) for the following requirement: 1. Students take courses in a college 2. Customers have accounts in a bank 3. People own vehicles 4. Employees manage projects 5. Machines are made up of parts 6. A college offers several courses. Attributes of the course include course code‚ name and credits. Each course may have zero or more subjects 7. Hotel (HotelNo‚ Name‚ Add‚ TelNo) Room (RoomNo‚ HotelNo‚ Type‚ Price) Booking (HotelNo
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Suppose all three of the following conditions hold: 1. A → B 2. It is not the case that B → A 3. B → C Then the functional dependency A → C (which follows from 1 and 3 by the axiom of transitivity) is a transitive dependency. In database normalization‚ one of the important features of third normal form is that it excludes certain types of transitive dependencies. E.F. Codd‚ the inventor of the relational model‚ introduced the concepts of
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Explain how normalization occurs including changes in the work cycle. Describe the normalized child. Dr. Montessori used the term normalization to distinguish one of the processes that she saw in her work with the children at San Lorenzo in Rome. This process‚ the process of normalization‚ occurs when development is proceeding normally. She used the word normalization as she believed that these wonderful traits‚ these impressive qualities belonged to all children and was not a characteristic
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the organization. An efficient model of data should as well require little maintenance and oversight if built properly. Designing a data model promoting data redundancy and normalization provides a design that requires minimal modification to handle. (Tupper 2011) For your organization I propose the following normalization steps using the table information provided to achieve normalized data table structures. 1. Figure 1 and Figure 2 represent the data in tabular format with no cells having a
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Requirements Analysis and Conceptual Data Modeling….…..22 Requirements analysis 22 Conceptual data modeling 24 View integration methods 25 Entity Clustering 30 V. Transforming the Conceptual Model to SQL…………...………32 VI. Normalization and normal forms ………………………………38 First normal form to third normal form (3NF) and BCNF 38 3NF synthesis algorithm (Bernstein) 43 VII. An Example of Logical Database Design………………………48 VIII. Business Intelligence………………………………..……….....52
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