Exam 6: Database Design 2: Design Method

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An entity that depends on another entity for its own existence is called a(n)____________________.​

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Independent entities have ____ in an E-R diagram​

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When the existence of one entity depends on the existence of another related entity,there is a(n)____________________.​

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In IDEF1X,the ____ is the symbol for category.​

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____________________ key restrictions determine the relationships between tables.​

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During the ____________________ design,designers must consider the characteristics of the particular DBMS that the organization will use.​

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You create a many-to-many relationship by creating a new table whose primary key is the combination of the primary keys of the original tables.​

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To obtain information about ____________________ you might ask users questions such as: "If you know a particular employee number,can you establish other information,such as employee name?"​

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An entity-relationship (E-R)model is an approach to representing data in a(n)____________________.​

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Nulls are used when a value is either unknown or inapplicable.​

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____________________ refers to the number of items that must be included in a relationship.​

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When designing a database,you might find it helpful to design a(n)____ to obtain the required information from users.​

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The first step in creating a user view is to normalize the tables.​

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Combining the following two tables would result in ____.​ Employee (EmployeeNum,LastName,FirstName,WageRate,SocSecNum,DepartmentNum) Employee (EmployeeNum,LastName,FirstName,Street,City,State,PostalCode)

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Explain the difference between a minimum cardinality of zero and a minimum cardinality of one.​

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The primary key is a unique identifier.​

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The properties of the entities you choose as you design the user view will become the ____ in the appropriate tables.​

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When provided with a user view or some sort of stated requirement,you must develop a collection of tables that will support it.​

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​In an E-R diagram,a dashed line represents an identifying relationship and a solid line represents a nonidentifying relationship.

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Columns that are of interest strictly for the purpose of retrieval are known as ____________________.​

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