Add Column Aggregation

This dialog defines how a column is aggregated. To create a custom aggregation, see Add Custom Aggregation.

To add an attribute, click Add attribute: and follow these steps:

  1. Output is the name of column that holds the results of aggregation; the default is to Auto Generate the name. To provide a name, unselect Auto Generate and type in the name.

  2. Select the Column to aggregate from the list.

  3. Select the Function to apply to the column. The functions available depend on the data type of the column. For example, you can specify average (AVG) for a numerical value.

  4. To define a Sub Group By column, click Edit to launch Edit Group By. (Sub-Group By is explained in Define Aggregation.) It is not necessary to define a Sub Group By column.

  5. When you are done, click OK.