Learning Pentaho CTools

Mapping data

We need to be aware of the way that data mapping is done in the chart. You can understand how it works if you can imagine data input as a table. CCC can receive the data as two different structures: relational and crosstab. If CCC receives data as a crosstab query, it will translate it to a relational structure. You can see this in the following examples.

Crosstab

The following table is an example of the crosstab data structure:

	Column Data 1	Column Data 2
Row Data 1	Measure Data 1.1	Measure Data 1.2
Row Data 2	Measure Data 2.1	Measure Data 2.2

Tip

Creating crosstab queries

To create a crosstab query, usually you can do this with the group when using SQL; or just use MDX, which allows us to easily specify a set for the columns ...