7Reporting Aggregated Data Using the Group Functions
CERTIFICATION OBJECTIVES
7.01 Identify the Available Group Functions
7.02 Describe the Use of Group Functions
7.03 Group Data by Using the GROUP BY Clause
7.04 Include or Exclude Grouped Rows by Using the HAVING Clause
This chapter reviews the features in SQL that identify individual rows in a given table and aggregate summary information about them. We’ll look at aggregate functions, and also at two new clauses in the SELECT statement: the GROUP BY clause and its companion, the HAVING clause. You will need to fully understand these capabilities in order to pass ...
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