[networked]

Shameless plug: Sqawk can do nearly the same without you defining a schema.

  $ ps aux | sqawk -output table \
                   'select user, round(sum("%mem"), 2) as memtotal
                    from a
                    group by user
                    order by memtotal desc' \
                   header=1
  ┌────────┬────┐
  │dbohdan │67.1│
  ├────────┼────┤
  │  root  │3.5 │
  ├────────┼────┤
  │ avahi  │0.0 │
  ├────────┼────┤
  │ daemon │0.0 │
  ├────────┼────┤
  │message+│0.0 │
  ├────────┼────┤
  │ nobody │0.0 │
  ├────────┼────┤
  │  ntp   │0.0 │
  ├────────┼────┤
  │ rtkit  │0.0 │
  ├────────┼────┤
  │ syslog │0.0 │
  ├────────┼────┤
  │ uuidd  │0.0 │
  ├────────┼────┤
  │whoopsie│0.0 │
  └────────┴────┘

Link: https://github.com/dbohdan/sqawk