[Tutor] Advice on multi-dimensional data storage

[Matt Williams]

Dear Tutors,

I am looking for some advice. I have some data that has three dimensions to
it. I would like to store it such that one could manipulate (query/ update/
etc.) by dimension - so it would be feasible to ask for all of the data
that shares a value in d1, or iterate over all of the values via d2.

I found some answers on StackOverflow which I need to have a longer look
at, but I would be grateful for any thoughts.

Thanks,
Matt