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could put on my own shelf overall.
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2.8
So we'll look at this database.
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But we'll need a few tools in our toolkit,
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metaphorically, to actually interact with this database.
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3.07
And one of them is going to be Visual Studio Code.
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Visual Studio code is an IDE, integrated development environment, to write code
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and to edit files with.
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It's also often called VS Code.
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Now, in VS Code, we'll also be able to use SQLite, this database management
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system, or a DBMS for short, to actually interact with that database.
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So we'll be using these two tools combined
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to work with the database of longlisted books for the International Booker
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Prize.
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1.42
And although we'll be using it here, SQLite is not just used in this course.
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It's used in a variety of applications.
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You could think too of phone applications,
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where SQLite is often used on those devices have much lower memory.
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You could think too of it being used on desktop applications
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3.6
to simplify the process of storing data there too.
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3.18
You could even think of it being used on websites
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to help store information that user submits via a form, for example.
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4.9
So we'll jump into using SQLite, but keep in mind
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that not just in this course you'll use it,
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2.58
but also, it's used in a variety of applications here too.
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4.84
So why don't we just jump right into things and start using our environment
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4.35
and start using SQLite?
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1.32
So I'll go over here to my computer and will open up, let's say, VS Code.
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We're here.
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0.84
You can see I have my terminal environment.
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2.4
And if you're familiar, you can type things like ls
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to see the files that are in your current folder.
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So I'll type ls right here.
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And I'll see this database called longlist.db.
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Again, working with books that have been longlisted or considered
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for the International Booker Prize.
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So if I want to open up this file, I can use this command.
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5.46
Then this command is going to be called SQLite 3.
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4.53
Or I can take some file that I have, like longlist.db, and open
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it using this program called SQLite 3.
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3.09
Well, it's called SQLite 3 because this is the third version of the SQLite
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software.
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1.17
So let's try this in our terminal.
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I'll go back over here, and I'll say sqlite3 longlist.db.
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And now, I'll hit Enter.
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And notice how my terminal prompt changes.
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It's no longer dollar sign.
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It now says sqlite in front.
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This means I'm inside of my SQLite environment.
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So to clear things up, let me just clear my terminal.
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I can use Control-L for this.
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And now I have just that prompt up top.
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3.27
And now a question I want to answer in this case first is, what
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data do I actually have in my database?
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What data is actually here for me to look at and to ask questions about?
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5.13
Now, for this question, I can use my very first SQL
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keyword, which will be called SELECT.
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So SELECT is a way for me to select some rows in a table inside of my database.
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Using SELECT, I can get back certain rows
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or, in this case, perhaps all of them just to get a taste of what's inside.
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4.12
So let's try using SELECT on this database to understand
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what rows we have in our table here.
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Let me go back to my computer and to my SQLite environment.
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And I will try this very first SQL keyword.
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I'll say SELECT.
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And I can use this star operator here to say select everything.
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I want every row and every column from this table.
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Now, it's not enough for me to simply say select star and end my query.
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I had to tell SQL which table do I want to select rows from.
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In this case, I know I table was called longlist.
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So I'll say SELECT star from "longlist," quote, unquote.
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And to end my query, I'll say Semicolon.
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And then finally, I can hit Enter.
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2.79
And notice how I get a lot of data back.
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2.46
This is a lot of data all at once.
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1.595
But it's because my terminal is a little bit small,
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there's a lot of rows and columns here.
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1.84
So I could probably simplify this just a little bit.
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3.17
And instead of saying SELECT star, I could also select a particular column
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4.32
from my table.
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I could say, for instance, SELECT, let's say,
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just the title column from my database for my table like this.
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I just know already that there is a column called title.
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4.07
So now, I'll try this instead-- not select star, but select title instead.
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4.2
I'll hit Enter.
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1.02
And now, this looks a little bit better.
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2.25
I can see the titles inside of this table from top to bottom.
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7.33
Now, the neat thing here is I can select more than one column too.
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Let's say I don't want just the title--
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I want titles and authors in my search.
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2.55
Well, I could do that as well.
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1.9
Let me try this.
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SELECT not just "title," quote, unquote, but then I'll
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say comma and some new column to select.
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I'll select also the authors from this table.
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And I'll select them from the longlist table like this.
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Now I'll hit Semicolon to end my query.
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Hit Enter.
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And now I'll see a variety of columns here,
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3.3
in particular the title and the author column.
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Now, this is going to be like all of my columns so far.
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