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You have completed SQLite from the Command Line!
You have completed SQLite from the Command Line!
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Learn how to create a database using the SQLite command line tools!
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[MUSIC]
0:00
Hi, I'm Ben.
0:05
And in this workshop, we're going to
learn about SQLite from the command line.
0:06
So far, we've been learning
SQL inside of SQL Playgrounds.
0:11
And while there's nothing wrong with that,
0:15
it's not super helpful when you need
to start creating your own databases.
0:17
In this workshop, we're going to
look at how you can create and
0:21
manage databases right
on your own computer.
0:24
The first thing you'll need to do
is make sure that you have SQLite
0:28
installed on your computer.
0:31
If you're on a Mac or Linux computer,
then it's likely you already have SQLite.
0:33
To see if SQLite is already on
your computer, open up a terminal.
0:38
And at the command prompt type,
sqlite3 then hit Enter.
0:42
If your terminal looks like this,
then you're good to go.
0:48
If it doesn't,
then you'll need to install SQLite.
0:52
Check out the teacher's notes for
links to installation instructions.
0:55
All right,
now there's two commands that you
0:59
absolutely need to know to be able
to use SQLite from the command line.
1:01
The first is .help.
1:06
Calling .help will show you a list of
all the commands that you can run.
1:08
So if you're looking for
1:14
anything in particular,
remember to look in .help first.
1:15
The second command you absolutely
need to know Is .quit,
1:20
which quits SQLite and
brings us back to the command prompt.
1:23
It's easy to forget this one.
1:29
So if you're ever stuck at the SQLite
prompt remember that you can
1:31
always use .quit to exit.
1:36
And if you forget .quit you can always
use .help to help you remember.
1:38
Okay, now that we're back at the command
prompt, let's create our own database.
1:44
But first let's create a folder where
we can keep our practice files.
1:50
You can do this using the file
explorer if you'd like, but
1:55
I'll be using the command line.
1:58
Let's type mkdir, which stands for
make directory, and
2:00
let's call it DatabasePractice.
2:03
And hit Enter to create our new folder.
2:10
Then let's change directory into
that folder by typing cd and
2:13
then the name of the folder.
2:18
You can use tab to auto-complete.
2:20
And hit Enter to run the command.
2:23
Now that we're in our new folder, we can
create a new database by typing sqlite3
2:26
followed by the name of the database.
2:31
Let's type sqlite3, add a space, and
2:34
then name our database mydatabase.db,
then hit Enter.
2:39
And now we can start using our database.
2:47
Though before we do, let's quickly
check out our DatabasePractice folder.
2:50
We just created a new database,
and yet, there's nothing in here.
2:58
Turns out that SQLite
won't create our database
3:04
until it's more than
just an empty database.
3:07
So let's move forward with creating a
table, and then we'll check back in later.
3:11
Back in the terminal, let's create a new
table to store information about cars.
3:16
Let's type CREATE TABLE,
we'll name it CARS.
3:21
Then for the columns, we'll give it an ID,
which should be a PRIMARY KEY.
3:27
And then we'll add a couple more
columns like MAKE, MODEL, and YEAR.
3:34
Then hit Enter to run it.
3:41
And that's right.
3:43
We can't forget the semicolon.
3:44
If you're ever looking at something like
this, you just need to add a semicolon.
3:46
And with that, if we check back in
with our database practice folder,
3:52
we can see that we've
now got mydatabase.db.
3:57
Awesome.
4:01
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