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Lecture5

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database management system oracle computer science
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  Copyright © Oracle Corporation, 2001. All rights reserved. Aggregating Data Using Group Functions  5-2 Copyright © Oracle Corporation, 2001. All rights reserved. Objectives After completing this lesson, you should be able to do the following: ã Identify the available group functions ã Describe the use of group functions ã Group data using the GROUP BY  clause ã Include or exclude grouped rows by using the HAVING  clause  5-3 Copyright © Oracle Corporation, 2001. All rights reserved. What Are Group Functions? Group functions operate on sets of rows to give one result per group. EMPLOYEES The maximum salary in the EMPLOYEES  table. …    5-4 Copyright © Oracle Corporation, 2001. All rights reserved. Types of Group Functions ã  AVG ã COUNT ã  MAX ã  MIN ã STDDEV ã SUM ã  VARIANCE
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