Working with Crosstabs

Crosstabs are a type of data container that operates on aggregated data. The row and column fields in the crosstab are typically string fields or enumerations while the intersection of the crosstab must always be a summarized piece of data, typically a numeric value.

You can see three areas in the crosstab object:

Columns
Data items placed here will generate column headers. Multiple data items can be dropped here to create nested column headers.
Rows
Data items placed here will generate the rows of data in the crosstab. Multiple data items can be placed here to generate nested rows.
Measures
Only a single data item can be placed here that will be aggregated against the rows and columns selected.