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Tag: 2nd Edition by Dr. Narayan S. Umanath

Which forecasting technique can place the most emphasis on recent values? How does it do this?

QUESTION: “Which forecasting technique can place the most emphasis on recent values? How does it do this?”

Admin August 27, 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?”

Admin 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?”

Admin September 11, 2018
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How are null values treated when one or more appear during the execution of a group function?

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

Admin 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?

Admin 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…

Admin 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?

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

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

Admin 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…

Admin September 9, 2018
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What is a Cartesian product operation?

QUESTION: “What is a Cartesian product operation?”

Admin September 9, 2018
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Forum Description

QUESTION:

"Which forecasting technique can place the most emphasis on recent values? How does it do this?"

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ANSWER:

Exponential smoothing weighs all previous values with a set of weights that decline exponentially. It can place full weight on the most recent period (with an alpha of 1.0). This, in effect, is the naïve approach, which places all its emphasis on the last period’s actual demand.

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