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Published 20 hours ago • verified publisher icon bigplum

How can I use aggregate？

Open aaronwang062441 opened this issue 8 years ago • 1 comments

How can I use aggregate？ such as： db.mycol.aggregate([{$group : {_id : "$by_user", num_tutorial : {$sum : 1}}}])

aaronwang062441 avatar Dec 13 '16 14:12 aaronwang062441

How can I use aggregate？ such as： db.mycol.aggregate([{$group : {_id : "$by_user", num_tutorial : {$sum : 1}}}]) I have the same problem! Have you solved it?

StartAt24 avatar Jan 31 '19 08:01 StartAt24