chap06 - Chapter 6 Group Functions Chapter 6 Introduction...

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Chapter 6 Introduction to 1 Chapter 6 Group Functions
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Chapter 6 Introduction to 2 Chapter Objectives Differentiate between single-row and multiple-row functions Use the SUM and AVG functions for numeric calculations Use the COUNT function to return the number of records containing non-NULL values Use COUNT(*) to include records containing NULL values
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Chapter 6 Introduction to 3 Chapter Objectives Use the MIN and MAX functions with non- numeric fields Determine when to use the GROUP BY clause to group data Identify when the HAVING clause should be used List the order of precedence for evaluating WHERE, GROUP BY, and HAVING clauses
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Chapter 6 Introduction to 4 Chapter Objectives State the maximum depth for nesting group functions Nest a group function inside a single-row function Calculate the standard deviation and variance of a set of data, using the STDDEV and VARIANCE functions
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Chapter 6 Introduction to 5 Group Functions Return one result per group of rows
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chap06 - Chapter 6 Group Functions Chapter 6 Introduction...

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