Derived Data

Derived data enables you to reference report results in other reports, in essence "stacking" results from sub-select queries. The derived data feature also supports cohort analysis, where a set of data from a report is used (joined back) in another report, and allows you to build computed columns for re-use.

You must first define derived data, perhaps define additional derived data, and then use it. There also options for saving, viewing and deleting existing derived data measures.

Availability Note. By default, the Derived Data option is turned off. It can be turned on by a user with administrative privileges; see Enabling Derived Data.

Derived Data is very useful in determining weighted averages and other, more complex calculations. For example, in the dataset World Life Expectancy, life expectancy is reported at the level of each country, for each year. If we wanted to determine the life expectancy by region or subregion, we have to calculate a weighted average of life expectancies. You can also parametrize derived data definitions using bracket notation.

The following steps demonstrate how to use derived data on a table visual based on the dataset World Life Expectancy [data source samples.world_life_expectancy]. The initial set-up follows:

using derived data on a table visual
  1. Define Derived Data
  2. Define Additional Derived Data
  3. Use Derived Data
  4. View Derived Data Definitions
  5. Save Derived Data
  6. Delete Derived Data Definitions