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How to construct an aggregate expression in the expression builder

  1. In Expression Builder, under Category, select BIRT Functions. Sub-Category displays the classes of functions that BIRT defines.
  2. Select Total to display the aggregate functions.
  3. Double-click the aggregate function that you want to use. The function appears in the expression area of Expression Builder.
  4. Within the parentheses, ( ), of the function, specify the data-set field (or column binding that refers to the data-set field) whose values you want to aggregate:
    1. Under Category, choose Available Data Sets or Available Column Bindings.
    2. Under Sub-Category, choose the data set that contains the field, or the element that contains the column bindings.
    3. Double-click the data-set field or column binding to insert it between the parentheses of the aggregate function.
  5. Choose OK to save the expression.


(c) Copyright Actuate Corporation 2006

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