Category: 4. Data Retrieval

Welcome to another detailed SQL tutorial! Today, we’ll be learning about two important SQL commands, LIMIT and OFFSET, which allows you to control how many rows you get from a database query. This is super useful when working with large datasets and you only want to see a small portion of the results. What is LIMIT? The LIMIT command in SQL helps you limit the number of rows returned by a query. This means if your table has hundreds of thousands of rows, you can use LIMIT it to display only a small set of those rows. Example: Imagine you…

Welcome to today’s SQL course! In this post, we’ll learn how to sort data in SQL using the ORDER BY clause. Sorting helps us organize the results of our queries in a way that makes sense, whether we want to arrange data in ascending or descending order. Let’s start by breaking it down: What is ORDER BY? The ORDER BY clause in SQL is used to sort the results of a query. We can order the results based on one or more columns. By default, it sorts the data in ascending order (ASC), but we can also sort it in…

In SQL, the WHERE clause helps us filter records that match certain conditions. Imagine you’re searching for something in a big box of toys, but you only want the red ones. The WHERE clause is like telling SQL to only give you the red toys. You can use different conditions (like equal to, greater than, or less than) to filter data in many ways. Structure of a WHERE Clause: The basic structure of the WHERE clause looks like this: Common Comparison Operators Here are some common comparison operators you can use in the WHERE clause: Examples of WHERE Clause Usage:…

Welcome to the world of SQL! Today, we’ll start learning how to use the basic SELECT query. SELECT is one of the most important commands in SQL because it allows you to retrieve or “select” data from a database. Think of a database like a giant bookshelf full of books, and each book contains information. The SELECT query is like the librarian helping you find and read specific books. Let’s dive into this simple but powerful SQL command. What is the SELECT Query? The SELECT query allows you to pick certain pieces of information from a table in a database.…