The column of the ALV Display can be aggregated using the add_aggregation( ) method of the class CL_SALV_AGGREGATION.
DATA lr_salv_aggregation TYPE REF TO cl_salv_aggregation.
Lr_salv_aggregation = lr_salv_table=>get_aggregations( ).
Lr_salv_aggregation->set_aggregation_before_items( abap_true ).
Lr_salv_aggregation->add_aggregation( columnname = ‘AGE’
aggregation = if_salv_c_aggregation=>average ).
The following aggregation types are available.
If_salv_c_aggregation=>minimum.
If_salv_c_aggregation=>maximum.
If_salv_c_aggregation=>average.
If_salv_c_aggregation=>total.
If_salv_c_aggregation=>none.