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Now to get started with the aggregation pipeline,

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we need some data and I will use our persons data again,

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you'll find it attached to this video one more time.

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We'll import it with mongo import and you should make sure that you run this command in the folder where

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you store your persons.json file so that you can simply enter the file name and you're good to go

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and then I'll store it in a database which I'll name analytics,

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the name is of course up to you

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and then a collection which I'll name persons.

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I will also add the json array flag here, that is required because the persons.json file has an array

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of documents. With that, I can now hit enter and this should import 5000 documents into the database.

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Now let's connect to the database with our shell

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and there, let's use our analytics database where we should see our persons collection.

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Now just to bring this back in memory, a person looks like this,

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we get quite a lot of data on a person including things like some dummy location and this is all random

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data, just to stress this again,

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so some dummy location, the age and some other data as you can see here.

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Now let's see how we can use the aggregate framework on this.