One of the primary purposes for breaking data into groups is to run calculations on each group of records instead of on all the records in the report.
When the program summarizes data, it sorts the data, breaks it into groups, and then summarizes the values in each group. It does this all automatically.
The program includes a number of summarizing options. Depending on the data type of the field you plan to summarize, you can:
Note: You can also calculate summary fields across hierarchical groupings. To do so, select "Sum across hierarchy" in the Insert Subtotal, Insert Grand Total, or Insert Summary dialog box.
The Insert Summary dialog box appears.
For example, if you wanted to count the number of customers you had per country, you would create a count field based on customer, and group by country.
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