I'm trying to come up with a query for some work I have to do for a month to date view.
We have a base table that lists all date varialbes, like full date, month parts, day parts etc. and that is where most of the date and time views source from.
For this view I am trying to out put this data set below as an example:
Problem I perceive with that is that it won't sort chonologically
We store "Month" as a Date (or DateTime even) "Rounded" to 1st-of-the-month, so we can sort on that and get everything for 01-Nov-2017 followed by everything for 01-Dec-2017
If want to display "Nov-2017" and "Dec-2017", on the user report, we format the date to just show Month/Year. We do this as close to the user as possible - i.e. if we can do that in the Reporting Tool that means that the report, also, receives the "month" as a full date, "01-Nov-2017", and then any local column-sort etc. can still work chronologically, the bit that does the "presentation for the user" displays it as "Nov-2017"
I don't understand what those are then if not "2017-11-30", "November", "30th"
If you want to "group" by month then round the date to "months" (in effect "the first of the month") or "years", "quarters", whatever, and group on that. Then in the presentation layer display that value as appropriate - e.g. display "2017-01-01" as "Jan-2017" or "2017Q1", or just "2017" if that is what you want, but I recommend that you retain a valid, complete, date during the processing phase - rather than converting it to Text String, i.e. a formatted representation of the date, and then trying to group on it - and leave the formatting to the Presentation layer