Page Comparison

By the end of this chapter you will be able to:

• Set up aggregate attributes on pipes
• Read aggregate attributes from pipes into a stream

In this exercise you will create a report of total and average last billed amounts, aggregated by Region:

In your model, add a new table:

1. Hover over Customers in England, and press 

   Insert excerpt
   _table_new _table_new nopanel true

   .
2. Give the new table the Name: Customer Summary by Region
3. Double-click on the new pipe to open the details form.
4. Go to the Sort/Group section:
   
   • Open the list of attributes, and drag the attribute Region into the list of Sort/Group attributes.
5. Go to the Aggregate Attributes section:
   1. Press 

      Insert excerpt
      _add _add nopanel true

       to add a new aggregate attribute
   2. In the new aggregate attribute form:
      • Set the Aggregate Function to Count
      • Leave the Attribute blank
      • Set the New Attribute Name to CountRecords
      • Press 

        Insert excerpt
        _finish _finish nopanel true

        .
   3. Add another aggregate attribute:
      • Press 

        Insert excerpt
        _attributes_show _attributes_show nopanel true

        .
      • Drag the attribute BILLAMOUNT into the aggregate attributes list
      • Note that this already uses the attribute function Sum – leave this as it is.
      • Update the name of the aggregate value:
        • Double-click on the new aggregate attribute.
        • Update the Name to TotalLastBillAmount
        • Press 

          Insert excerpt
          _finish _finish nopanel true

          .
   4. Add another aggregate attribute:
      • Press Image Removed Show the list of Attributes

        Insert excerpt
        _table_attributes_show _table_attributes_show nopanel true

      • Drag the attribute BILLAMOUNT into the aggregate attributes list
      • Update the details for this new aggregate attribute:
        • Double-click on it
        • Update the Aggregate Function to Average.
        • Update the Name to AvgLastBillAmount
        • Press 

          Insert excerpt
          _finish _finish nopanel true

          .

Now you need to configure your output table:

1. Drag the attribute Region from the Sort/Group section of the pipe onto the table Customer Summary by Region.
2. Drag the aggregate attributes you added from the Aggregate Attributes section of the pipe onto the table Customer Summary by Region.
3. In the main pipe configuration form, press 

   Insert excerpt
   _finish _finish nopanel true

   .

Remember to save your model layout.

1. Run analysis on Customer Summary by Region
2. View the data in this table – check that the aggregated report has been generated correctly.