Data query language
Okay kiddo, let me explain to you about something called "data query language". Whenever we want to get some information or data from a big collection of data, we need to ask questions in a way that the computer can understand. This is where data query language comes in.
Think of it like talking to a robot. You have to use a specific language that the robot understands to give it commands. Similarly, when we want to get information from a big collection of data (like a database), we need to use a specific language that the computer understands to ask it questions.
This language is called a data query language. There are different types of data query languages, but the most common one is called SQL (pronounced "sequel").
So, if we want to ask a question like "What is the total number of apples sold last month?", we would use SQL to ask the question in a way that the computer can understand. The SQL query might look something like this:
SELECT SUM(apples_sold) FROM sales WHERE month='last month';
This query is telling the computer to add up all the apples sold in the "sales" table for the month of "last month" and give us the total.
So, data query language is just a way for us to talk to the computer in a language that it understands so we can get the information we need.
Think of it like talking to a robot. You have to use a specific language that the robot understands to give it commands. Similarly, when we want to get information from a big collection of data (like a database), we need to use a specific language that the computer understands to ask it questions.
This language is called a data query language. There are different types of data query languages, but the most common one is called SQL (pronounced "sequel").
So, if we want to ask a question like "What is the total number of apples sold last month?", we would use SQL to ask the question in a way that the computer can understand. The SQL query might look something like this:
SELECT SUM(apples_sold) FROM sales WHERE month='last month';
This query is telling the computer to add up all the apples sold in the "sales" table for the month of "last month" and give us the total.
So, data query language is just a way for us to talk to the computer in a language that it understands so we can get the information we need.