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    Category: Data Modeling and Database Design

    Data Modeling and Database Design

    How are null values treated when one or more appears during the execution of a group function?

    QUESTION: How are null values treated when one or more appears during the execution of a group function?

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    Aehtisaam Safi September 14, 2020
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    The city government has collected the following data on annual sales tax

    QUESTION: The city government has collected the following data on annual sales tax collections and new car registrations: Determine the following: (a) The least-squares regression…

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    Aehtisaam Safi September 3, 2020
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    What do the ALL and ANY operators do when used in a subquery?

    QUESTION: “What do the ALL and ANY operators do when used in a subquery?”

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    Aehtisaam Safi September 11, 2018
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    What is the SQL operator (i.e., keyword) used in conjunction with pattern matching?

    QUESTION: “What is the SQL operator (i.e., keyword) used in conjunction with pattern matching?”

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    Aehtisaam Safi September 11, 2018
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    What is the result of an attempt to add, subtract, multiply, or divide two number fields, one of which

    QUESTION: What is the result of an attempt to add, subtract, multiply, or divide two number fields, one of which contains a null value?

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    Aehtisaam Safi September 11, 2018
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    Which comparison operators can be used when searching for null values? Which comparison operators

    QUESTION: Which comparison operators can be used when searching for null values? Which comparison operators cannot be used when searching for null values? What is…

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    Aehtisaam Safi September 11, 2018
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    What is the difference between a character field that contains a null value and a character field that

    QUESTION: What is the difference between a character field that contains a null value and a character field that contains a single blank space?

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    Aehtisaam Safi September 9, 2018
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    What is meant by the term division compatibility?

    QUESTION: “What is meant by the term division compatibility?”

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    Aehtisaam Safi September 9, 2018
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    Why does the relation created as result of a Projection operation on a relation that includes the

    QUESTION: Why does the relation create a result of a Projection operation on a relation that includes the primary key not contain fewer tuples than…

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    Aehtisaam Safi September 9, 2018
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    What is a Cartesian product operation?

    QUESTION: “What is a Cartesian product operation?”

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    Aehtisaam Safi September 9, 2018
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    • Data Modeling and Database Design, 2nd Edition by Dr. Narayan S. Umanath, Richard Scamell 1001
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