小计功能? Of course
我paste一段介绍吧
Calculations are a vital part of reporting and ReportBuilder provides a rich
set of components and events which allow you to perform a wide range of
calculations. Simple calculations can be performed without any coding using the
DBCalc component. This component provides Sum, Average, Minimum, Maximum and
Count functions. The calculations can be group-based or report-based. More
complex calculations can be achieved via the Variable component. At a minimum,
the Variable component requires an OnCalc event handler to be assigned. The
timing of this event can be correlated to any number of occurances within the
report generation process (i.e. the component calculates once for each
occurance of: the start of the report, a master record traversal, a detail
record traversal, a group break, the start of a page, the start of a column,
etc.) The Variable component also has an OnReset event which can be similarly
correlated. This provides the utmost in calculation flexibility.
