You can specify a GROUP BY or HAVING clause for aggregation.
Use a GROUP BY clause to group rows based on the value of one or more expressions. A GROUP BY clause groups rows but does not guarantee the order of the result set.
Specify a GROUP BY clause in one of the following ways:
Use a HAVING clause to restrict the groups of rows to those groups for which a specified condition is TRUE.
Specify a HAVING clause in one of the following ways:
Click Next to continue.
Copyright © 2006, 2008, Oracle. All rights reserved.