How to group tasks by date and then display seperately by the file those tasks are located

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You can try this solution:

Dataview - in a TASK query, how do I GROUP BY multiple fields?

hmm, working with multiple groups in Tasks queries is definitely a hard “task” (at least in dql… but I don’t know js). I can suggest a way, not exactly as your desired output, but “similar”. The idea is: joining both fields and group them. Try both examples: 1 TASK FROM "myfolder" WHERE !completed GROUP BY list(due, section) AS abc 2 TASK FROM "myfolder" WHERE !completed GROUP BY (due + "<br>" + section) AS abc