Query for displaying tasks grouped by hashtags or parent's hashtags

Questions & Help Queries
4

Your scenario doesn’t sound typical, but here is a proof-of-concept:

#+BEGIN_QUERY
{
 :query [:find ?res
 :where
   [?page :block/name ?page-name]
   [?block :block/page ?page]
   [?block :block/marker ?marker]
   (or-join [?block ?ref]
     [?block :block/refs ?ref]
     [?block :block/path-refs ?ref]
   )
   [?ref :block/original-name ?ref-name]
   [(!= ?ref-name ?marker)]
   [(!= ?ref-name ?page-name)]
   [?block :block/content ?content]
   [(str ?ref-name ": " ?content) ?res]
 ]
 :result-transform sort
}
#+END_QUERY