_________ relational type is the “relational ideal.” | 1:1 | M:1 | 1:M | M:N | Any attribute that is part of a key is known as a __________. | Key attribute | Key determiner | Logical attribute | Selector | The attribute B is _________ the attribute A if each value in column A determines one and only one value in column B. | Logically dependent on | Determined by | Owned by | Functionally dependent on | All primary key entries are unique‚ and no part of a primary key may be __________
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a fashion model. Who wouldn’t enjoy traveling worldwide‚ getting paid for posing and looking fabulous‚ meeting and receiving gifts from world famous fashion designers? While this all sounds amazing at first‚ people seldom know what is beyond the pictures‚ shows and glamour. The real danger is what occurs behind the scenes of the modeling business. There is a dark side to the fashion modeling industry which involves the exploitation of young models. There are cases of overworking models beyond the
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Kheng Horng Gan Edwin IS-240.009‚ Disc6 2/23/14 Questions 2 – Evaluate the advantages of the relational database model A relational database model has many advantages such as increase flexibility‚ increase information security‚ increase scalability and performance‚ increase information integrity (quality)‚ and reduce information redundancy. Firstly‚ most of the companies use database because it can handle changes easily and quickly. There are two views used to understand the flexible database
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Chapter 5 Normalization of Database Tables Discussion Focus Why are some table structures considered to be bad and others good and how do you recognize the difference between good and bad structures? From an information management point of view‚ possibly the most vexing and destructive problems are created through uncontrolled data redundancies. Such redundancies produce update and delete anomalies that create data integrity problems. The loss of data integrity can destroy the usefulness
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What Is Super Key In Dbms? Superkey - A superkey is defined in the relational model as a set ofattributes of a relation variable (relvar) for which it holds that inall relations assigned to that variable there are no two distincttuples (rows) that have the same values for the attributes... in Software What Is Super Key In Dbms Give Example? A superkey is a combination of attributes that can be uniquely used to identify a database record.With primary key if any other attribute is added then that
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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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Owns to Accounts. The E/R diagram below showes underlined keys and the numerocity constraint. [pic] 3. The E/R diagram below represents ships. Ships are said to be sisters if they were designed from the same plans. Convert this diagram to a relational database schema. Solution: Ships(name‚ yearLaunched) SisterOf(name‚ sisterName) [pic] 4. Consider a relation representing the present position of molecules in a closed container. The attributes are an ID for the molecule‚ the
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Higher Diploma in Computer Science-2013/2014 Batch HDCS-AS06-ACA Student Number: Theory Session: Assignment submission date: 04th August 2014 Last date of acceptance (with penalty and marks reduction): 11th August 2014 Assignment Topic Consider the following scenario. Dinuki Hire firm is a small family business that stocks general equipment such as garden tools‚ car maintenance tools etc. for hiring to its customers. A database system is required to simplify management of the business
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information) 4. Backup and recover 5. Exporting and importing data 6. Keeping integrity of data ------------------------------------------------------------------------------------------------------------ Types of database systems: 1. Relational database - Data and structure are independent in program - Use tables (rows and columns) - Use query - Powerful management system - Use the following types of relationships between tables: A. One-to-one relationship (1:1) - A particular
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Management Information Systems MANAGING THE DIGITAL FIRM‚ 12TH EDITION GLOBAL EDITION Chapter 6 FOUNDATIONS OF BUSINESS INTELLIGENCE: DATABASES AND INFORMATION MANAGEMENT Management Information Systems CHAPTER 6: FOUNDATIONS OF BUSINESS INTELLIGENCE: DATABASES AND INFORMATION MANAGEMENT Learning Objectives • Describe how the problems of managing data resources in a traditional file environment are solved by a database management system • Describe the capabilities and value of a database
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