The following example illustrates how the Selected
Columns and Sort By/Group
By criteria work together when generating reports:
The columns
circled in red (above) depict the columns selected, which are the
attributes that you match against for generating the report. Each
log entry from the data source is parsed and these columns are matched
on. If multiple sessions have the same values for the selected columns,
the sessions are aggregated and the repeat count (or sessions) is incremented. The
column circled in blue indicates the chosen sort order. When the
sort order (Sort By) is specified, the data
is sorted (and aggregated) by the selected attribute. The
column circled in green indicates the Group By selection,
which serves as an anchor for the report. The Group By column
is used as a match criteria to filter for the top N groups. Then,
for each of the top N groups, the report enumerates the values for
all the other selected columns. |