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Now, before we now get started with diving

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into the MongoDB syntax, and how we can write queries,

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and run queries against our MongoDB database,

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there is one additional tool you might wanna install.

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And that's the MongoDB Shell.

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Now, actually, we already did install a shell

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together with the MongoDB server in the last lecture.

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And we already did start the shell there.

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That was that tool which we executed in the command line

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or by double-clicking on it on Windows

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to then connect to our running MongoDB server.

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So that tool, which we'll use for inputting commands

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for sending commands to the server.

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But depending on the point of time

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you are watching this course,

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that shell might be the old shell,

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which is perfectly fine to use.

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There's nothing wrong with it,

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but there is a newer shell available.

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And you either already have that

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or you need to install it separately.

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And you can tell

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whether you already have it by the look of it.

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And whether installing

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it separately changes anything for you.

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Now, to get that newer shell,

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you can search for MongoDB Shell.

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And you might find this link to the Legacy Mongo Shell,

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which is two older one,

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which you already might have installed automatically

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together with the MongoDB server.

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And you should all have find

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this MongoDB Shell download link.

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Alternatively, you can get there on mongodb.com

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by clicking on Software, Developer Tools.

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And then there, choosing the MongoDB Shell.

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And then here, you can click on Download Now

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to be taken to that same page.

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Now here again, you can choose your operating system.

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There are different versions available

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for all the operating systems.

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And you can then simply download that shell.

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On Windows, instead, you would have this installer,

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which you download.

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And once downloaded,

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we simply execute it and then walk through that installer.

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We can keep that default path,

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which it chooses here and then choose Next.

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And start this installation.

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So it's really straightforward here.

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And then we're done on Windows.

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Now, back on macOS.

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Here, we have to extract that ZIP file.

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And we'll get a new folder,

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which contains such a bin folder.

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And in there, you have two different files.

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And for us, the Mongo Shell file is the most important one.

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But you can grab,

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and you should grab both files and copy them.

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And then move them to the directory

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where you installed your other MongoDB tools.

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On macOS, that should be your USR folder.

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And you need to make sure that you can view hidden folders

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and files to view that.

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You can do that by hitting Command + Shift and dot.

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And then in that USR folder, go to local bin.

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And that's where we copied the other Mongo commands

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before when we installed MongoDB on macOS.

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So now, move these two new executables into that folder.

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You might need to enter your password to do that.

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On Windows, you can now open your Windows menu,

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the start menu.

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And there, search for MongoSH.

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So Mongosh and execute this command, this tool,

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which is the Mongo Shell we just installed.

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And this will open up the Mongo Shell

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and connect to your running MongoDB server.

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So of course, therefore,

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you need to have such a running MongoDB server,

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this running service here in case of Windows

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so that this connection succeeds.

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On macOS, we would typically open our terminal.

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And simply execute Mongosh as a command there.

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And then connect to our running MongoDB server.

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And for this, of course,

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we need to have our server up and running there as well.

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That is a must have.

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Now, you can ignore any warnings

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or any messages you might see here.

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We don't need to worry about them right now.

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Instead, we can now use this shell to interact

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with the database.

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And then this shell

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is connected on both Windows and macOS.

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And this shell in the end supports the same commands

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you could also use in the old shell.

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So you could use either of the two shells,

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but it is more future-proof to follow along

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with this newer shell.

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And maybe you already had this shell as a default shell

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right from the start when you first installed MongoDB

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in the last lectures anyways.

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Now, just as before, you can run show DBs

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in here to see a list of your databases.

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And there, we got some dummy starting databases,

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but I'm now going to continue with this new shell here.