date - Get day of month of timestamp in Mongodb -


is there operation of mongodb use retrieve day of month out of timestamp, inside aggregation?

i this:

{"$dayofmonth" : "$timestamp"}

if not possible, best way convert "$timestamp" mongodb date format?

yes there $dayofmonth aggregation operator.

db.blah.insert({ts:new date("2014-02-01")}) db.blah.aggregate([{$project:{dayofmonth:{$dayofmonth:"$ts"}}}])

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