Simple report adds up my integer values into a single line even though I did not request sum or aggr

I want my report to return only one column which is an integer field. BUT the behavior is different than I expected; if I have for ex. three records with values 2/4/5 it will only return one line with the total (11)

I deactivate the aggreation (setting it up to none). I know I could use the activityid as hidden and it would do the trick but I only want one column in the SQL query.

Thanks!