I am not able to find the air_alliances collection from the sample data load as a result not able to continue with the $lookup lab exercises
Can you post a screenshot of
show collections to see what’s being loaded?
Either you posted your issue in the wrong forum (M121) or you are looking at the wrong cluster and/or database.
The database sample_mflix is for the M220 series of courses.
For the course M121 the database to use is aggregations.
Since you are looking for the collection air_alliances, M121 is the appropriate forum. It means you are not connected to the appropriate cluster. Please revise the initial lessons where the connection string to use is mentioned.
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
In this course, you connect to a cluster already set up for you, with mostly read privileges over one database (aggregations), and the collections they work with are movies, air_alliances, etc etc.
But I also recommend to go back and review the first lessons
@Santiago_Miranda Thank you, I will go through the first chapter of aggregation again.