AT clauses can be used in FOR loops only. An AT TOP clause specifies that when a group starts, the statement in the AT TOP clause has to be executed before executing the main code in the FOR loop. An AT BOTTOM clause specifies that an action has to be executed after the last record of a group has been processed and before the first record in the next group. Format AT BOTTOM OF field-name [,...] statement AT TOP OF field-name [,...] statementAdditional Information: explode extract