Lab - $group and Accumulators - which db?

MongoDB University M121: The MongoDB Aggregation Framework
#1

Hi,

I am currently on : Lab - $group and Accumulators

Although I haven’t yet added the standard deviation yet, I can already see some of the values for other fields are not correct for the answer.

Could you confirm using the right database, or tell me which one I should be using.

I am using
mongo mongodb://cluster0-shard-00-00-jxeqq.mongodb.net:27017,cluster0-shard-00-01-jxeqq.mongodb.net:27017,cluster0-shard-00-02-jxeqq.mongodb.net:27017/aggregations?replicaSet=Cluster0-shard-0 --authenticationDatabase admin --ssl -u m121 -p aggregations --norc

If I am using the right DB, then what sort of things could be tripping me up?

Many thanks in advance
Russell

#2

Yes you are at the right place.

#3

Thank you, appreciated.

#4

I don’t know what type of field is awards?

#5

HI @ANGELA_CABALLERO_ARROYO,
The awards field is of type string.
Here is an example of the awards field:

awards: '1 win.',

If you have any doubts, please feel free to reach out to us.

Thanks and Regards.
Sourabh Bagrecha,
MongoDB

1 Like
#6

The best way when you are unsure is to check with Compass Analyze Shema tool.

#7

One question,which field does aggrupate the summary of the ratings?

#8

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