Original subtitles

‫All right, so now we're getting to the core of the course, what is askew?

‫Well, and there may be a lot of questions surrounding what a school is.

‫Well, school is a language that we will be using to talk to our databases.

‫It's a programming language and a programming language, in essence, is a set of instructions that

‫we are using to talk to a system to get a specific output and output being an answer.

‫In this case, we're asking for data.

‫And with a school, we are mainly talking to databases.

‫Now, a database is nothing more than a structured set of data.

‫Now, you may ask yourself, what kind of structure are we talking about here, right?

‫There are different structures that you could basically apply to data.

‫Well, heck, we could take a notepad and we could write a book in there, or we could take an Excel

‫sheet and make a personal budget.

‫And all of these ways of storing data are your own structure, right?

‫Like you determine in a notepad.

‫This is my headline.

‫This is my body.

‫This is my paragraph.

‫In an Excel sheet, you can say these are my columns, these are my rows.

‫This is how I'm going to put the data in here.

‫But when we go off to database country, we're looking at these huge companies like Amazon and Microsoft

‫and all of these big corporations that are basically helping out millions and millions and millions

‫of people.

‫And when you have that much data, you can't just go into a flat file or an Excel sheet and store that

‫much data.

‫You need a larger system and a database.

‫In essence, is that larger system?

‫Now, what determines, like, how we're going to store data in a database and what makes a database?

‫Right.

‫Well, there are different models you can follow.

‫And throughout the course, we're going to talk about these different models, mainly focusing on one.

‫And Eskil is going to be the language that we're going to be utilizing to talk to the database, to

‫pull data, to insert data and so forth, and when we use a school, we are going to be writing statements,

‫statements, being instructions that we're going to give to the database to give us back data.

‫These are called queries.

‫Now, let's dive a bit deeper into what a query exactly is.