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Now sometimes you also want to delete all entries in a collection,

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you can do this in two ways.

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One way is that you simply reach out to the collection and then you execute delete many and you simply

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pass an empty pair of curly braces,

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this simply is a filter that matches every document in the collection and therefore, if I now hit enter, all

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documents are gone.

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As you can see, if I find all documents, nothing is returned.

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The alternative would be that you of course delete the entire collection. On a collection in the shell

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here,

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you can call drop. Now important, you as an administrator working with the shell might do that, later when

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you build a real application like in our from shell to driver module towards the end of the course,

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you will most likely not call drop from within your application code because you rarely have a situation

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where your app, your website or whatever you're building should drop an entire collection. Adding collections

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and deleting collections typically is more of a sys admin task,

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still it's worth knowing how it works.

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Well if you execute this, you'll see true if it succeeded and false if it did not, which it did in this

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case because I already deleted it.

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You can also delete the entire database with drop database, just on the database, so not on users but

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drop database, this dropped the user database and automatically gets us out of the database

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which is why I can now execute this and well, nothing was dropped because I'm not in a database,

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I would have to use a different one to then drop that.

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So dropping collections and databases

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obviously also gets rid of the data in there but delete one and delete many are the more common methods

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you'll use

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also in your application side code. And writing queries is all you need to know to find documents you

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need to delete.