Hello! Today we want to talk about the SELECT statement in SQL. You may know that this statement is one of the fundamental and most important SQL commands. To put it simply, SELECT allows us to retrieve data from a database table. This means if you have a database containing shared information or stored products, you can use SELECT to view this information.
One of the interesting points about SELECT is that you can use different parameters to filter the data and only see the information you need. For example, if you want to only see specific shared information or only products that have a specific price above a certain amount, SELECT can help you with that.
Further along, there are several important points regarding SELECT that we will discuss. For instance, when you want to retrieve data from multiple tables, you need to use joins. Or for ordering the data, you may want to use ORDER BY. These are simple yet very practical points that apply to real-life projects.
Another important thing is that when you use SELECT, you are essentially performing a query. Queries are one of the main tasks for interacting with databases, and over time, you can effectively utilize them.
Example of SELECT Statement
SELECT name, price
FROM products
WHERE price > 3000
ORDER BY price DESC;
Line by Line Explanation of Code
SELECT name, price
This line indicates that we want to select the columns name and price from the table.
FROM products
Here, it specifies that we want to retrieve data from the products table.
WHERE price > 3000
This line puts a condition that only retrieves products whose prices are greater than 3000.
ORDER BY price DESC
In the end, it indicates that the information should be ordered by price in descending order (from high to low).