WEBVTT 00:00.570 --> 00:00.970 OK. 00:00.990 --> 00:06.540 So as I mentioned in the last video we're going to do a really quick activity where you're basically 00:06.540 --> 00:11.880 going to try experimenting with these three commands and enter them into the mosque. 00:12.050 --> 00:13.220 Well. 00:13.740 --> 00:15.530 So if you stopped it if you quit. 00:15.660 --> 00:21.510 Make sure that you open it back up using the this command and then try running these one at a time and 00:21.510 --> 00:23.240 just see what happens. 00:23.250 --> 00:29.040 So puzzle video if you'd like and do that and then come back and in a few seconds we'll go over what 00:29.040 --> 00:31.710 happens. 00:31.730 --> 00:32.370 All right. 00:32.370 --> 00:33.910 So let's start with the first one. 00:33.960 --> 00:35.200 Help. 00:35.220 --> 00:40.640 So I'm going to clean up my terminal here just by using the clear command. 00:40.830 --> 00:43.830 Then I'm going to access the Seelye. 00:43.830 --> 00:46.010 I'll just use the up arrow. 00:47.040 --> 00:52.410 So now I have this Selye command line interface ready for me to type some commands. 00:52.410 --> 00:59.430 So I will do that first one which is help and you can see we're actually prompted to type that. 00:59.550 --> 01:06.430 So when I hit enter all it does is give me a list of commands of things I can do. 01:06.550 --> 01:13.140 You can see you've got things like clear help which you just used print prompt. 01:13.220 --> 01:16.480 We've got quit which we already used as well. 01:16.590 --> 01:23.160 Basically it's just a list of things that you can do as you can see we can also try help contents 01:26.310 --> 01:31.360 and we basically get a list of categories that we could access. 01:31.530 --> 01:36.360 So if we wanted to know more about let's just pick one of these at random. 01:36.360 --> 01:39.780 Don't worry let's try data types. 01:39.870 --> 01:48.810 We can do help data types and it kind of dives down further and gives us information about what those 01:48.810 --> 01:49.250 are. 01:49.260 --> 01:52.110 We haven't talked about data types so don't stress about that. 01:52.200 --> 01:55.880 The next command to try is show databases. 01:56.040 --> 01:59.700 So we'll come back to try that show data bases 02:02.360 --> 02:09.440 and it gives us this nice little representation here of the current databases that we have in this instance 02:09.460 --> 02:11.360 of my as well. 02:11.360 --> 02:15.240 So we haven't talked about how you make a new database you might be wondering what's going on. 02:15.260 --> 02:17.320 There's already five of them here. 02:17.450 --> 02:23.300 All of those were created automatically when we created this minuscule instant. 02:23.330 --> 02:28.290 So don't worry it doesn't really matter what they are right now but they're there automatically. 02:28.370 --> 02:33.650 There are five different databases in the next section we'll actually talk about what a database is 02:33.650 --> 02:39.110 when you create a new database why you create a new one when you use the same one but just wanted to 02:39.110 --> 02:44.060 show you this command because you'll be able to use it in the future when you create a new database 02:44.090 --> 02:45.460 and you want to make sure it worked. 02:45.680 --> 02:50.030 You can type show databases and you should see a new one added below. 02:50.250 --> 02:55.220 And the final command here is select at at hostname. 02:55.250 --> 03:01.820 This is also kind of a weird one that most likely you will never type after this but I just wanted to 03:01.820 --> 03:07.490 show it to you not because it's something you need to do but just it's something that you can do quickly 03:07.490 --> 03:14.300 and immediately and all of this here is just to illustrate the point that the Selye works by you typing 03:14.300 --> 03:14.790 commands. 03:14.800 --> 03:17.110 Hitting enter and getting some text back. 03:17.330 --> 03:24.460 So that process over and over and over here tells me that my hostname is this string here basically 03:24.460 --> 03:26.270 am I using my user name. 03:26.270 --> 03:29.450 Yours will be different depending on your workspace and your user name. 03:29.660 --> 03:36.470 So as I mentioned it's honestly not important what it is or why it's there at this point but I just 03:36.470 --> 03:40.800 wanted you to see that you can type these commands in and get something back out. 03:41.210 --> 03:44.960 So that's it for this really quick kind of silly exercise. 03:45.170 --> 03:49.310 But in the next section we're going to start actually learning as all commands. 03:49.310 --> 03:54.770 So you'll be able to start interacting immediately creating databases creating new tables adding data 03:54.770 --> 03:58.030 into those tables and it gets a lot more interesting there I promise.